.mignore file causes sync error due to new Dropbox business folder structure

[DaGaMs]

Describe the bug

Dropbox recently changed how folders are organised for business accounts. The top-level directory in the dropbox root directory is not writeable to the user any more, but instead contains sub-folders for the various groups you're a member of, and a folder with your full name as a "private" space.

Now, when I put the .mignore file in the top-level directory, I always get this error message in the maestral log:

2023-11-10 20:53:04 sync INFO: Could not sync .mignore
Traceback (most recent call last):
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/errorhandling.py", line 90, in convert_api_errors
    yield
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/client.py", line 923, in _upload_helper
    md = self.dbx.files_upload(
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/dropbox/base.py", line 3210, in files_upload
    r = self.request(
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/dropbox/dropbox_client.py", line 351, in request
    raise ApiError(res.request_id,
dropbox.exceptions.ApiError: ApiError('f83b74a47e3a471ab4de5b2cf0122231', UploadError('path', UploadWriteFailed(reason=WriteError('no_write_permission', None), upload_session_id='pid_upload_session:ABIHCmsQXv3-yUSYqyde1axtA0vxhu_k-PA026FXyvpq14ZYsA')))

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/sync.py", line 2311, in _create_remote_entry
    status = self._on_local_file_modified(event)
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/sync.py", line 2490, in _on_local_file_modified
    md_new = self.client.upload(
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/client.py", line 870, in upload
    res = self._upload_helper(
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/client.py", line 331, in wrapper
    return func(__self, *args, **kwargs)
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/client.py", line 923, in _upload_helper
    md = self.dbx.files_upload(
  File "/opt/gridware/depots/1a8f5697/el7/pkg/apps/python3/3.8.1/gcc-4.8.5/lib/python3.8/contextlib.py", line 131, in __exit__
    self.gen.throw(type, value, traceback)
  File "/users/bschuster/gridware/share/python/3.8.1/lib/python3.8/site-packages/maestral/errorhandling.py", line 92, in convert_api_errors
    raise dropbox_to_maestral_error(exc, dbx_path, local_path)
maestral.exceptions.InsufficientPermissionsError: Could not upload file. You do not have permissions to write to the target location.

System:

• Maestral version: 1.8.0
• Python version: 3.8.1
• OS: [e.g. Ubuntu] Debian
• Desktop environment: [e.g. Gnome 3.32] na
• PyQt version (for Linux GUI): na

Additional context