TypeError when opening a project

Description

What steps will reproduce the problem?

While in a project opened at Spyder start-up I try to click Projects->Open Project and I receive this error

Traceback

  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\projects\plugin.py", line 98, in <lambda>
    triggered=lambda v: self.open_project())
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\projects\plugin.py", line 288, in open_project
    self.notify_project_open(path)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\decorators.py", line 22, in wrapper
    self.emit_request(method, params, requires_response)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\projects\plugin.py", line 553, in emit_request
    self.main.completions.broadcast_notification(method, params)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\plugin.py", line 323, in broadcast_notification
    req_type, req)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\languageserver\plugin.py", line 578, in broadcast_notification
    self.send_notification(language, request, params)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\languageserver\plugin.py", line 569, in send_notification
    client.perform_request(request, params)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\languageserver\client.py", line 527, in perform_request
    _id = handler(params)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\languageserver\decorators.py", line 41, in wrapper
    params = req(self, *args, **kwargs)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\languageserver\providers\workspace.py", line 46, in send_workspace_folders_change
    folder_uri = path_as_uri(folder)
  File "C:\anaconda3\envs\tf20\lib\site-packages\spyder\plugins\completion\languageserver\providers\utils.py", line 51, in path_as_uri
    path_obj = pathlib.Path(osp.abspath(path))
  File "C:\anaconda3\envs\tf20\lib\ntpath.py", line 526, in abspath
    return normpath(_getfullpathname(path))
TypeError: _getfullpathname: path should be string, bytes or os.PathLike, not NoneType

Versions

• Spyder version: 4.1.4
• Python version: 3.7.7
• Qt version: 5.9.6
• PyQt5 version: 5.9.2
• Operating System: Windows 10

Dependencies

# Mandatory:
atomicwrites >=1.2.0           :  1.4.0 (OK)
chardet >=2.0.0                :  3.0.4 (OK)
cloudpickle >=0.5.0            :  1.5.0 (OK)
diff_match_patch >=20181111    :  20200713 (OK)
intervaltree                   :  None (OK)
IPython >=4.0                  :  7.16.1 (OK)
jedi =0.17.1                   :  0.17.1 (OK)
nbconvert >=4.0                :  5.6.1 (OK)
numpydoc >=0.6.0               :  1.1.0 (OK)
paramiko >=2.4.0               :  2.7.1 (OK)
parso =0.7.0                   :  0.7.0 (OK)
pexpect >=4.4.0                :  4.8.0 (OK)
pickleshare >=0.4              :  0.7.5 (OK)
psutil >=5.3                   :  5.7.0 (OK)
pygments >=2.0                 :  2.6.1 (OK)
pylint >=1.0                   :  2.5.3 (OK)
pyls >=0.34.0;<1.0.0           :  0.34.1 (OK)
qdarkstyle >=2.8               :  2.8.1 (OK)
qtawesome >=0.5.7              :  0.7.2 (OK)
qtconsole >=4.6.0              :  4.7.5 (OK)
qtpy >=1.5.0                   :  1.9.0 (OK)
rtree >=0.8.3                  :  0.9.4 (OK)
sphinx >=0.6.6                 :  3.1.2 (OK)
spyder_kernels >=1.9.2;<1.10.0 :  1.9.2 (OK)
watchdog                       :  None (OK)
zmq >=17                       :  19.0.1 (OK)

# Optional:
cython >=0.21                  :  0.29.21 (OK)
matplotlib >=2.0.0             :  3.2.2 (OK)
numpy >=1.7                    :  1.18.5 (OK)
pandas >=0.13.1                :  1.0.5 (OK)
scipy >=0.17.0                 :  1.5.0 (OK)
sympy >=0.7.3                  :  1.6.1 (OK)

[ccordoba12]

Thanks @dalthviz for the feedback. I have two comments about this:

1. Issue #12967 shows that the problem was present before 4.1.4.
2. Although we can’t reproduce this on our side, the solution is simply validating that the project’s path is not None when trying to open a project.

[dalthviz]

Just in case, I was able to reproduce this: