Error when starting Jupyter Lab

General
1

Hi, I am unable to run install any extension.
Error communicating with server extension. Consult the documentation for how to ensure that it is enabled.

Reason given:

Error: 500 (Internal Server Error)

Everytime I start Jupyter Lab, hough I am able to initialize it I get this thread in the log

Uncaught exception GET /lab/api/extensions?1608023475663 (127.0.0.1)
    HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', uri='/lab/api/extensions?1608023475663', version='HTTP/1.1', remote_ip='127.0.0.1')
    Traceback (most recent call last):
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/web.py", line 1703, in _execute
        result = await result
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/handlers/extension_manager_handler.py", line 221, in get
        extensions = yield self.manager.list_extensions()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/handlers/extension_manager_handler.py", line 221, in get
        extensions = yield self.manager.list_extensions()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/handlers/extension_manager_handler.py", line 91, in list_extensions
        pkg_info = yield self._get_pkg_info(name, data)
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/handlers/extension_manager_handler.py", line 91, in list_extensions
        pkg_info = yield self._get_pkg_info(name, data)
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/handlers/extension_manager_handler.py", line 160, in _get_pkg_info
        outdated = yield self._get_outdated()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/handlers/extension_manager_handler.py", line 160, in _get_pkg_info
        outdated = yield self._get_outdated()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/handlers/extension_manager_handler.py", line 191, in _load_outdated
        data = yield self.executor.submit(
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "~/anaconda3/envs/th/lib/python3.8/concurrent/futures/_base.py", line 432, in result
        return self.__get_result()
      File "~/anaconda3/envs/th/lib/python3.8/concurrent/futures/_base.py", line 388, in __get_result
        raise self._exception
      File "~/anaconda3/envs/th/lib/python3.8/concurrent/futures/thread.py", line 57, in run
        result = self.fn(*self.args, **self.kwargs)
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/commands.py", line 541, in get_latest_compatible_package_versions
        return handler.latest_compatible_package_versions(names)
      File "~/anaconda3/envs/th/lib/python3.8/site-packages/jupyterlab/commands.py", line 1682, in latest_compatible_package_versions
        raise ValueError(msg % keys)
    ValueError: "['jupyter-matplotlib@0.7.4']" is not a valid npm package