Jupyter fails to open

Traceback (most recent call last):
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\runpy.py”, li
ne 193, in run_module_as_main
main”, mod_spec)
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\runpy.py”, li
ne 85, in run_code
exec(code, run_globals)
File "C:\Users\Anshul\AppData\Local\Programs\Python\Python36\Scripts\jupyter-n
otebook.EXE_main
.py", line 4, in
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\notebook\notebookapp.py”, line 76, in
from .base.handlers import Template404, RedirectWithParams
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\notebook\base\handlers.py”, line 24, in
import prometheus_client
File "C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\prometheus_client_init
.py", line 3, in
from . import (
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\prometheus_client\gc_collector.py”, line 44, in
GC_COLLECTOR = GCCollector()
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\prometheus_client\gc_collector.py”, line 15, in init
registry.register(self)
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\prometheus_client\registry.py”, line 40, in register
names = self._get_names(collector)
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\prometheus_client\registry.py”, line 80, in _get_names
for metric in desc_func():
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\prometheus_client\gc_collector.py”, line 37, in collect
collected.add_metric([generation], value=stat[‘collected’])
File “C:\Users\Anshul\AppData\Local\Programs\Python\Python36\lib\site-packages
\prometheus_client\metrics_core.py”, line 145, in add_metric
self.samples.append(Sample(self.name + ‘_total’, dict(zip(self._labelnames,
labels)), value, timestamp))
TypeError: new() missing 1 required positional argument: ‘exemplar’