404 : Not Found when accessing Jupyter Lab

[Emporea]

I get

404 : Not Found

You are requesting a page that does not exist!

when accessing jupyter lab.

Every other "app" is working, like vnc, the old jupyter lab and so on.

Ubuntu 18.04 Docker minimal Build Version 0.13.2

docker logs

ml-workspace    | [W 19:38:29.116 NotebookApp] Error loading server extension jupyterlab
ml-workspace    |     Traceback (most recent call last):
ml-workspace    |       File "/opt/conda/lib/python3.8/site-packages/notebook/notebookapp.py", line 2030, in init_server_extensions
ml-workspace    |         func(self)
ml-workspace    |       File "/opt/conda/lib/python3.8/site-packages/jupyterlab/serverextension.py", line 13, in load_jupyter_server_extension
ml-workspace    |         extension.update_config(serverapp.config)
ml-workspace    |       File "/opt/conda/lib/python3.8/site-packages/nbclassic/shim.py", line 138, in update_config
ml-workspace    |         shimmed_config = self.shim_config_from_notebook_to_jupyter_server(config)
ml-workspace    |       File "/opt/conda/lib/python3.8/site-packages/nbclassic/shim.py", line 228, in shim_config_from_notebook_to_jupyter_server
ml-workspace    |         raise TraitError("Trait, {}, not found.".format(trait_name))
ml-workspace    |     traitlets.traitlets.TraitError: Trait, server_extensions, not found.
ml-workspace    | [W 19:38:29.118 NotebookApp] Error loading server extension jupyterlab_git
ml-workspace    |     Traceback (most recent call last):
ml-workspace    |       File "/opt/conda/lib/python3.8/site-packages/notebook/notebookapp.py", line 2027, in init_server_extensions
ml-workspace    |         mod = importlib.import_module(modulename)
ml-workspace    |       File "/opt/conda/lib/python3.8/importlib/__init__.py", line 127, in import_module
ml-workspace    |         return _bootstrap._gcd_import(name[level:], package, level)
ml-workspace    |       File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
ml-workspace    |       File "<frozen importlib._bootstrap>", line 991, in _find_and_load
ml-workspace    |       File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ml-workspace    |     ModuleNotFoundError: No module named 'jupyterlab_git'
ml-workspace    | /opt/conda/lib/python3.8/site-packages/jupyter_server/transutils.py:13: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead.
ml-workspace    |   warnings.warn(warn_msg, FutureWarning)
ml-workspace    | [W 19:38:29.369 NotebookApp] Error loading server extension nbresuse
ml-workspace    |     Traceback (most recent call last):
ml-workspace    |       File "/opt/conda/lib/python3.8/site-packages/notebook/notebookapp.py", line 2027, in init_server_extensions
ml-workspace    |         mod = importlib.import_module(modulename)
ml-workspace    |       File "/opt/conda/lib/python3.8/importlib/__init__.py", line 127, in import_module
ml-workspace    |         return _bootstrap._gcd_import(name[level:], package, level)
ml-workspace    |       File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
ml-workspace    |       File "<frozen importlib._bootstrap>", line 991, in _find_and_load
ml-workspace    |       File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ml-workspace    |     ModuleNotFoundError: No module named 'nbresuse'
ml-workspace    | [W 19:38:44.773 NotebookApp] 404 GET /lab (127.0.0.1) 7.340000ms referer=None

[lukasmasuch]

@Emporea Thanks for submitting the bug :) Did you update from a previous version of the workspace? There seems to be a problem involving the configuration backup functionality. Deleting the /workspace/.workspace/backup/.jupyter and /workspace/.workspace/backup/.config folders within the workspace and, subsequently, restarting the new workspace might solve this problem.

[Emporea]

Yeah I came from 0.12.x. But you were right, deleting the .workspace folder and recreating the docker container fixed the problem. Forgot about these persistent config files inside the workspace.

Thank you.