# Having issues with latest Voila examples on both Mac and Linux

**URL:** <https://discourse.jupyter.org/t/having-issues-with-latest-voila-examples-on-both-mac-and-linux/16014>\
**Category:** JupyterLab\
**Created:** [September 28, 2022, 11:05pm UTC](https://discourse.jupyter.org/t/having-issues-with-latest-voila-examples-on-both-mac-and-linux/16014 "2022-09-28T23:05:13Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![bischofs](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/bischofs/32/8065_2.png) [@bischofs](https://discourse.jupyter.org/u/bischofs)\
**Post date:** [September 28, 2022, 11:05pm UTC](https://discourse.jupyter.org/t/having-issues-with-latest-voila-examples-on-both-mac-and-linux/16014/1 "2022-09-28T23:05:14Z")

</div>

Using the latest python 3 on Mac and linux im running into these issues when I try to render the basic example from the voila GitHub. The page loads and widgets work fine but when I start voila the widgets dont render

Here is my pip list

```auto
Package Version             
---------------------- --------------------
aenum 3.1.0               
anyio 3.6.1               
apturl 0.5.2               
argon2-cffi 21.3.0              
argon2-cffi-bindings 21.2.0              
argparse-addons 0.7.0               
asttokens 2.0.8               
attrs 22.1.0              
Babel 2.10.3              
backcall 0.2.0               
bcrypt 3.1.7               
beautifulsoup4 4.11.1              
bitstruct 8.11.1              
bleach 5.0.1               
blinker 1.4                 
bqplot 0.12.36             
Brlapi 0.7.0               
cantools 36.2.0              
certifi 2019.11.28          
cffi 1.15.1              
chardet 3.0.4               
Click 7.0                 
colorama 0.4.3               
command-not-found 0.3                 
cryptography 2.8                 
cupshelpers 1.0                 
cycler 0.10.0              
dbus-python 1.2.16              
debugpy 1.6.3               
decorator 5.1.1               
defer 1.0.6               
defusedxml 0.7.1               
diskcache 5.2.1               
distro 1.4.0               
distro-info 0.23ubuntu1         
duplicity 0.8.12.0            
entrypoints 0.3                 
executing 1.1.0               
fasteners 0.14.1              
fastjsonschema 2.16.2              
future 0.18.2              
httplib2 0.14.0              
idna 2.8                 
importlib-metadata 4.12.0              
importlib-resources 5.9.0               
ipykernel 6.16.0              
ipython 8.5.0               
ipython-genutils 0.2.0               
ipywidgets 8.0.2               
jedi 0.18.1              
Jinja2 3.1.2               
json5 0.9.10              
jsonschema 4.16.0              
jupyter-client 7.3.5               
jupyter-core 4.11.1              
jupyter-server 1.19.1              
jupyterlab 3.4.7               
jupyterlab-pygments 0.2.2               
jupyterlab-server 2.15.2              
jupyterlab-widgets 3.0.3               
keyring 18.0.1              
kiwisolver 1.3.1               
language-selector 0.1                 
launchpadlib 1.10.13             
lazr.restfulclient 0.14.2              
lazr.uri 1.0.3               
lockfile 0.12.2              
louis 3.12.0              
lxml 4.9.1               
macaroonbakery 1.3.1               
Mako 1.1.0               
MarkupSafe 2.1.1               
matplotlib 3.4.2               
matplotlib-inline 0.1.6               
mistune 0.8.4               
monotonic 1.5                 
nbclassic 0.4.3               
nbclient 0.5.13              
nbconvert 6.5.4               
nbformat 5.6.1               
nest-asyncio 1.5.5               
netifaces 0.10.4              
notebook 6.4.12              
notebook-shim 0.1.0               
numpy 1.20.3              
oauthlib 3.1.0               
olefile 0.46                
packaging 21.3                
pandas 1.5.0               
pandocfilters 1.5.0               
paramiko 2.6.0               
parso 0.8.3               
pexpect 4.6.0               
pickleshare 0.7.5               
Pillow 7.0.0               
pip 20.0.2              
pkgutil-resolve-name 1.3.10              
prometheus-client 0.14.1              
prompt-toolkit 3.0.31              
protobuf 3.6.1               
psutil 5.9.2               
ptyprocess 0.7.0               
pure-eval 0.2.2               
pycairo 1.16.2              
pycparser 2.21                
pycups 1.9.73              
Pygments 2.13.0              
PyGObject 3.36.0              
PyJWT 1.7.1               
pymacaroons 0.13.0              
PyNaCl 1.3.0               
pyparsing 2.4.7               
pyRFC3339 1.1                 
pyrsistent 0.18.1              
python-apt 2.0.0+ubuntu0.20.4.8
python-can 3.3.4               
python-dateutil 2.8.2               
python-debian 0.1.36ubuntu1       
pytz 2022.2.1            
pyxdg 0.26                
PyYAML 5.3.1               
pyzmq 24.0.1              
reportlab 3.5.34              
requests 2.22.0              
requests-unixsocket 0.2.0               
SecretStorage 2.3.1               
Send2Trash 1.8.0               
setuptools 45.2.0              
simplejson 3.16.0              
six 1.14.0              
sniffio 1.3.0               
soupsieve 2.3.2.post1         
ssh-import-id 5.10                
stack-data 0.5.1               
systemd-python 234                 
terminado 0.15.0              
textparser 0.23.0              
tinycss2 1.1.1               
tomli 2.0.1               
tornado 6.2                 
traitlets 5.4.0               
traittypes 0.2.1               
ubuntu-advantage-tools 20.3                
ubuntu-drivers-common 0.0.0               
ufw 0.36                
unattended-upgrades 0.1                 
urllib3 1.25.8              
usb-creator 0.3.7               
viola 0.3.8               
voila 0.3.6               
wadllib 1.3.3               
wcwidth 0.2.5               
webencodings 0.5.1               
websocket-client 1.4.1               
websockets 10.3                
wheel 0.34.2              
widgetsnbextension 4.0.3               
wrapt 1.12.1              
xkit 0.0.0               
zipp 3.8.1               

```

from the Javascript log →

```auto
[Error] Could not instantiate widget
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:203721)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/base, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/base, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/base, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	(anonymous function) (basics.ipynb:45)
	(anonymous function) (voila.js:23:206167)
	(anonymous function) (voila.js:23:200145)
	s (voila.js:23:199035)
	promiseReactionJob
[Error] Unhandled Promise Rejection: Error: Module @jupyter-widgets/base, semver range ^2.0.0 is not registered as a widget module
	promiseEmptyOnRejected (voila.js:490:81479)
	promiseReactionJob
[Error] Unhandled Promise Rejection: Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	promiseEmptyOnRejected (voila.js:490:81479)
	promiseReactionJob
[Error] Unhandled Promise Rejection: Error: Module @jupyter-widgets/base, semver range ^2.0.0 is not registered as a widget module
	promiseEmptyOnRejected (voila.js:490:81479)
	promiseReactionJob
[Error] Unhandled Promise Rejection: Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	promiseEmptyOnRejected (voila.js:490:81479)
	promiseReactionJob
[Error] Unhandled Promise Rejection: Error: Module @jupyter-widgets/base, semver range ^2.0.0 is not registered as a widget module
	promiseEmptyOnRejected (voila.js:490:81479)
	promiseReactionJob
[Error] Unhandled Promise Rejection: Error: Module @jupyter-widgets/controls, semver range ^2.0.0 is not registered as a widget module
	promiseEmptyOnRejected (voila.js:490:81479)
	promiseReactionJob
[Error] Failed to load resource: the server responded with a status of 404 (Not Found) (voila.js.map, line 0)

```

---

<div class="post-metadata">

**Author:** ![bollwyvl](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/bollwyvl/32/904_2.png) [@bollwyvl](https://discourse.jupyter.org/u/bollwyvl)\
**Post date:** [September 28, 2022, 11:11pm UTC](https://discourse.jupyter.org/t/having-issues-with-latest-voila-examples-on-both-mac-and-linux/16014/2 "2022-09-28T23:11:36Z")

</div>

> [@bischofs](#):
>
> ```auto
> ipywidgets 8.0.2               
> 
> ```

For now, you may have to stick with `ipywidgets<8` until more widget libraries are updated.

---

<div class="post-metadata">

**Author:** ![bischofs](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/bischofs/32/8065_2.png) [@bischofs](https://discourse.jupyter.org/u/bischofs)\
**Post date:** [September 28, 2022, 11:46pm UTC](https://discourse.jupyter.org/t/having-issues-with-latest-voila-examples-on-both-mac-and-linux/16014/3 "2022-09-28T23:46:56Z")

</div>

new errors with updated ipywidgets version, Is there a list of deps with working versions anywhere for voila? cant find it

```auto
bischofs@ubuntu:~/voila$ voila notebooks/basics.ipynb 
[Voila] Using /tmp to store connection files
[Voila] Storing connection files in /tmp/voila_eri31hmq.
[Voila] Serving static files from /home/bischofs/.local/lib/python3.8/site-packages/voila/static.
[Voila] Voilà is running at:
http://localhost:8866/
Uncaught exception GET / (127.0.0.1)
HTTPServerRequest(protocol='http', host='localhost:8866', method='GET', uri='/', version='HTTP/1.1', remote_ip='127.0.0.1')
Traceback (most recent call last):
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/utils/importstring.py", line 32, in import_item
    pak = getattr(module, obj)
AttributeError: module 'mistune' has no attribute 'Renderer'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/bischofs/.local/lib/python3.8/site-packages/tornado/web.py", line 1713, in _execute
    result = await result
  File "/home/bischofs/.local/lib/python3.8/site-packages/voila/handler.py", line 226, in get
    async for html in gen:
  File "/home/bischofs/.local/lib/python3.8/site-packages/voila/handler.py", line 176, in get_generator
    await gen.initialize(template=template_arg, theme=theme_arg)
  File "/home/bischofs/.local/lib/python3.8/site-packages/voila/notebook_renderer.py", line 132, in initialize
    self.exporter = VoilaExporter(
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/traitlets.py", line 1183, in __new__
    inst.setup_instance(*args, **kwargs)
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/traitlets.py", line 1224, in setup_instance
    super(HasTraits, self).setup_instance(*args, **kwargs)
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/traitlets.py", line 1206, in setup_instance
    value.instance_init(self)
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/traitlets.py", line 1952, in instance_init
    self._resolve_classes()
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/traitlets.py", line 1957, in _resolve_classes
    self.klass = self._resolve_string(self.klass)
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/traitlets.py", line 1872, in _resolve_string
    return import_item(string)
  File "/home/bischofs/.local/lib/python3.8/site-packages/traitlets/utils/importstring.py", line 34, in import_item
    raise ImportError("No module named %s" % obj)
ImportError: No module named Renderer
500 GET / (127.0.0.1) 496.22ms

```

updated pip list

```auto
Package Version             
---------------------- --------------------
aenum 3.1.0               
anyio 3.6.1               
apturl 0.5.2               
argon2-cffi 21.3.0              
argon2-cffi-bindings 21.2.0              
argparse-addons 0.7.0               
args 0.1.0               
asttokens 2.0.8               
attrs 22.1.0              
Babel 2.10.3              
backcall 0.2.0               
bcrypt 3.1.7               
beautifulsoup4 4.11.1              
bitstruct 8.11.1              
bleach 5.0.1               
blinker 1.4                 
bqplot 0.12.36             
Brlapi 0.7.0               
cantools 36.2.0              
certifi 2019.11.28          
cffi 1.15.1              
chardet 3.0.4               
Click 7.0                 
clint 0.5.1               
colorama 0.4.3               
command-not-found 0.3                 
conda 4.3.16              
coverage 6.4.4               
cryptography 2.8                 
cupshelpers 1.0                 
cycler 0.10.0              
dbus-python 1.2.16              
debugpy 1.6.3               
decorator 5.1.1               
defer 1.0.6               
defusedxml 0.7.1               
diskcache 5.2.1               
distro 1.4.0               
distro-info 0.23ubuntu1         
duplicity 0.8.12.0            
entrypoints 0.4                 
executing 1.1.0               
fasteners 0.14.1              
fastjsonschema 2.16.2              
future 0.18.2              
httplib2 0.14.0              
idna 2.8                 
importlib-metadata 4.12.0              
importlib-resources 5.9.0               
ipydatawidgets 4.3.2               
ipykernel 6.16.0              
ipython 8.5.0               
ipython-genutils 0.2.0               
ipyvolume 0.5.2               
ipywebrtc 0.6.0               
ipywidgets 7.7.2               
jedi 0.18.1              
Jinja2 3.1.2               
json5 0.9.10              
jsonschema 4.16.0              
jupyter-client 7.3.5               
jupyter-core 4.11.1              
jupyter-server 1.19.1              
jupyterlab 3.4.7               
jupyterlab-pygments 0.2.2               
jupyterlab-server 2.15.2              
jupyterlab-widgets 1.1.1               
keyring 18.0.1              
kiwisolver 1.3.1               
language-selector 0.1                 
launchpadlib 1.10.13             
lazr.restfulclient 0.14.2              
lazr.uri 1.0.3               
lockfile 0.12.2              
louis 3.12.0              
lxml 4.9.1               
macaroonbakery 1.3.1               
Mako 1.1.0               
MarkupSafe 2.1.1               
matplotlib 3.4.2               
matplotlib-inline 0.1.6               
mistune 2.0.4               
monotonic 1.5                 
nbclassic 0.4.3               
nbclient 0.6.8               
nbconvert 7.0.0               
nbformat 5.6.1               
nest-asyncio 1.5.5               
netifaces 0.10.4              
notebook 6.4.12              
notebook-shim 0.1.0               
numpy 1.20.3              
oauthlib 3.1.0               
olefile 0.46                
packaging 21.3                
pandas 1.5.0               
pandocfilters 1.5.0               
paramiko 2.6.0               
parso 0.8.3               
pexpect 4.8.0               
pickleshare 0.7.5               
Pillow 7.0.0               
pip 20.0.2              
pkgutil-resolve-name 1.3.10              
prometheus-client 0.14.1              
prompt-toolkit 3.0.31              
protobuf 3.6.1               
psutil 5.9.2               
ptyprocess 0.7.0               
pure-eval 0.2.2               
pycairo 1.16.2              
pycosat 0.6.3               
pycparser 2.21                
pycups 1.9.73              
Pygments 2.13.0              
PyGObject 3.36.0              
PyJWT 1.7.1               
pymacaroons 0.13.0              
PyNaCl 1.3.0               
pyparsing 3.0.9               
pyRFC3339 1.1                 
pyrsistent 0.18.1              
python-apt 2.0.0+ubuntu0.20.4.8
python-can 3.3.4               
python-dateutil 2.8.2               
python-debian 0.1.36ubuntu1       
pythreejs 2.4.1               
pytz 2022.2.1            
pyxdg 0.26                
PyYAML 5.3.1               
pyzmq 24.0.1              
reportlab 3.5.34              
requests 2.22.0              
requests-unixsocket 0.2.0               
ruamel.yaml 0.17.21             
ruamel.yaml.clib 0.2.6               
scipy 1.9.1               
SecretStorage 2.3.1               
Send2Trash 1.8.0               
setuptools 45.2.0              
simplejson 3.16.0              
six 1.16.0              
sniffio 1.3.0               
soupsieve 2.3.2.post1         
ssh-import-id 5.10                
stack-data 0.5.1               
systemd-python 234                 
terminado 0.15.0              
textparser 0.23.0              
tinycss2 1.1.1               
tomli 2.0.1               
tornado 6.2                 
traitlets 5.4.0               
traittypes 0.2.1               
ubuntu-advantage-tools 20.3                
ubuntu-drivers-common 0.0.0               
ufw 0.36                
unattended-upgrades 0.1                 
urllib3 1.25.8              
usb-creator 0.3.7               
viola 0.3.8               
voila 0.3.6               
wadllib 1.3.3               
wcwidth 0.2.5               
webencodings 0.5.1               
websocket-client 1.4.1               
websockets 10.3                
wheel 0.34.2              
widgetsnbextension 3.6.1               
wrapt 1.12.1              
xkit 0.0.0               
yml 0.0.1               
zipp 3.8.1 

```

---

<div class="post-metadata">

**Author:** ![bollwyvl](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/bollwyvl/32/904_2.png) [@bollwyvl](https://discourse.jupyter.org/u/bollwyvl)\
**Post date:** [September 29, 2022, 2:33pm UTC](https://discourse.jupyter.org/t/having-issues-with-latest-voila-examples-on-both-mac-and-linux/16014/4 "2022-09-29T14:33:49Z")

</div>

> [@bischofs](#):
>
> ```auto
> module 'mistune' has no attribute 'Renderer'
> 
> ```

Looks like you may need to pin `nbconvert<7`. This is not really recommended, and might be worth taking up with the team. You’d probably want a minimum reproducer working on binder as well.