Jupyterhub-the-hard-way install

Please help!
Receiving the following error after walking through the “jupyterhub-the-hard-way” install.
This is a fresh install and the install appeared to go well with no errors.

/mnt/mfs/cluster/bin/Jupyterhub/bin# /mnt/mfs/cluster/bin/Jupyterhub/bin/jupyterhub -f /mnt/mfs/cluster/bin/Jupyterhub/etc/jupyter/jupyterhub_config.py
[I 2021-09-08 15:01:45.395 JupyterHub app:2459] Running JupyterHub version 1.4.2
[I 2021-09-08 15:01:45.396 JupyterHub app:2489] Using Authenticator: jupyterhub.auth.PAMAuthenticator-1.4.2
[I 2021-09-08 15:01:45.396 JupyterHub app:2489] Using Spawner: jupyterhub.spawner.LocalProcessSpawner-1.4.2
[I 2021-09-08 15:01:45.396 JupyterHub app:2489] Using Proxy: jupyterhub.proxy.ConfigurableHTTPProxy-1.4.2
[I 2021-09-08 15:01:45.434 JupyterHub app:1534] Loading cookie_secret from /mnt/mfs/cluster/bin/Jupyterhub/bin/jupyterhub_cookie_secret
[I 2021-09-08 15:01:45.896 JupyterHub proxy:497] Generating new CONFIGPROXY_AUTH_TOKEN
[W 2021-09-08 15:01:45.899 JupyterHub app:1808] No admin users, admin interface will be unavailable.
[W 2021-09-08 15:01:45.899 JupyterHub app:1809] Add any administrative users to c.Authenticator.admin_users in config.
[I 2021-09-08 15:01:45.900 JupyterHub app:1838] Not using allowed_users. Any authenticated user will be allowed.
[I 2021-09-08 15:01:46.089 JupyterHub app:2526] Initialized 0 spawners in 0.012 seconds
[W 2021-09-08 15:01:46.122 JupyterHub proxy:699] Running JupyterHub without SSL. I hope there is SSL termination happening somewhere else…
[I 2021-09-08 15:01:46.122 JupyterHub proxy:703] Starting proxy @ http://:8000/jupyter
15:01:46.344 [ConfigProxy] info: Proxying http://:8000 to (no default)
15:01:46.347 [ConfigProxy] info: Proxy API at
15:01:46.881 [ConfigProxy] info: 200 GET /api/routes
[I 2021-09-08 15:01:46.883 JupyterHub app:2774] Hub API listening on
15:01:46.886 [ConfigProxy] info: 200 GET /api/routes
[I 2021-09-08 15:01:46.887 JupyterHub proxy:347] Checking routes
[I 2021-09-08 15:01:46.887 JupyterHub proxy:432] Adding route for Hub: /jupyter/ =>
15:01:46.891 [ConfigProxy] info: Adding route /jupyter →
15:01:46.892 [ConfigProxy] info: Route added /jupyter →
15:01:46.893 [ConfigProxy] info: 201 POST /api/routes/jupyter
[I 2021-09-08 15:01:46.894 JupyterHub app:2849] JupyterHub is now running at http://:8000/jupyter
[I 2021-09-08 15:02:05.367 JupyterHub log:189] 302 GET /jupyter/ → /jupyter/hub/ (@ 2.43ms
[I 2021-09-08 15:02:05.519 JupyterHub log:189] 302 GET /jupyter/hub/ → /jupyter/hub/spawn (s2jmq@
*****) 95.72ms
[I 2021-09-08 15:02:05.732 JupyterHub provider:574] Creating oauth client jupyterhub-user-s2jmq
Last login: Wed Sep 8 14:52:02 EDT 2021
Linux hgrclogin01 4.9.0-13-amd64 #1 SMP Debian 4.9.228-1 (2020-07-05) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
[W 2021-09-08 15:02:05.826 JupyterHub auth:1079] Failed to open PAM session for s2jmq: [PAM Error 14] Cannot make/remove an entry for the specified session
[W 2021-09-08 15:02:05.826 JupyterHub auth:1080] Disabling PAM sessions from now on.
[I 2021-09-08 15:02:05.927 JupyterHub spawner:1483] Spawning jupyterhub-singleuser --port=37813 --SingleUserNotebookApp.default_url=/lab
[I 2021-09-08 15:02:09.391 JupyterHub log:189] 302 GET /jupyter/hub/spawn → /jupyter/hub/spawn-pending/s2jmq (s2jmq@*******) 3808.50ms
[I 2021-09-08 15:02:09.454 JupyterHub pages:402] s2jmq is pending spawn
[I 2021-09-08 15:02:09.651 JupyterHub log:189] 200 GET /jupyter/hub/spawn-pending/s2jmq (s2jmq@***) 213.83ms
[W 2021-09-08 15:02:15.596 JupyterHub base:1040] User s2jmq is slow to become responsive (timeout=10)
/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/jupyterhub/crypto.py:17: CryptographyDeprecationWarning: Python 3.5 support will be dropped in the next release of cryptography. Please upgrade your Python.
import cryptography
Traceback (most recent call last):
File “/usr/local/bin/jupyterhub-singleuser”, line 7, in
from jupyterhub.singleuser import main
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/jupyterhub/singleuser/init.py”, line 5, in
from .app import main
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/jupyterhub/singleuser/app.py”, line 16, in
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/traitlets/utils/importstring.py”, line 34, in import_item
module = import(package, fromlist=[obj])
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/notebook/notebookapp.py”, line 81, in
from .services.kernels.kernelmanager import MappingKernelManager, AsyncMappingKernelManager
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/notebook/services/kernels/kernelmanager.py”, line 18, in
from jupyter_client.session import Session
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/jupyter_client/init.py”, line 6, in
from .asynchronous import AsyncKernelClient # noqa
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/jupyter_client/asynchronous/init.py”, line 1, in
from .client import AsyncKernelClient # noqa
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/jupyter_client/asynchronous/client.py”, line 6, in
from jupyter_client.channels import HBChannel
File “/mnt/mfs/cluster/JupyterHub/lib/python3.5/site-packages/jupyter_client/channels.py”, line 47
time_to_dead: float = 1.0
SyntaxError: invalid syntax
[W 2021-09-08 15:03:05.141 JupyterHub user:767] s2jmq’s server never showed up at http://
after 60 seconds. Giving up
[E 2021-09-08 15:03:05.427 JupyterHub gen:623] Exception in Future <Task finished name=‘Task-21’ coro=<BaseHandler.spawn_single_user..finish_user_spawn() done, defined at /mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/jupyterhub/handlers/base.py:900> exception=TimeoutError(“Server at didn’t respond in 60 seconds”)> after timeout
Traceback (most recent call last):
File “/mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/tornado/gen.py”, line 618, in error_callback
File “/mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/jupyterhub/handlers/base.py”, line 907, in finish_user_spawn
await spawn_future
File “/mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/jupyterhub/user.py”, line 748, in spawn
await self._wait_up(spawner)
File “/mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/jupyterhub/user.py”, line 795, in _wait_up
raise e
File “/mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/jupyterhub/user.py”, line 762, in _wait_up
resp = await server.wait_up(
File “/mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/jupyterhub/utils.py”, line 236, in wait_for_http_server
re = await exponential_backoff(
File “/mnt/mfs/cluster/bin/Jupyterhub/lib/python3.8/site-packages/jupyterhub/utils.py”, line 184, in exponential_backoff
raise TimeoutError(fail_message)
TimeoutError: Server at didn’t respond in 60 seconds

[I 2021-09-08 15:03:05.553 JupyterHub log:189] 200 GET /jupyter/hub/api/users/s2jmq/server/progress (s2jmq@******) 55679.01ms
15:06:46.899 [ConfigProxy] info: 200 GET /api/routes
[I 2021-09-08 15:06:46.900 JupyterHub proxy:347] Checking routes
15:11:46.899 [ConfigProxy] info: 200 GET /api/routes