deb@mint-lap:~$ webapp-manager deb@mint-lap:~$ Traceback (most recent call last): File "/usr/lib/webapp-manager/", line 24, in from common import _async, idle, WebAppManager, download_favicon, ICONS_DIR, BROWSER_TYPE_FIREFOX File "/usr/lib/webapp-manager/", line 397, in def download_image(root_url: str, link: str) -> Optional[Image]: File "/usr/lib/python3.10/", line 312, in inner return func(*args, **kwds) File "/usr/lib/python3.10/", line 403, in __getitem__ return self._getitem(self, parameters) File "/usr/lib/python3.10/", line 529, in Optional arg = _type_check(parameters, f"{self} requires a single type.") File "/usr/lib/python3.10/", line 176, in _type_check raise TypeError(f"{msg} Got {arg!r:.100}.") TypeError: typing.Optional requires a single type. Got . Error in sys.excepthook: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 153, in apport_excepthook with os.fdopen(os.open(pr_filename, FileNotFoundError: [Errno 2] No such file or directory: '/var/crash/_usr_lib_webapp-manager_webapp-manager.py.1000.crash' Original exception was: Traceback (most recent call last): File "/usr/lib/webapp-manager/", line 24, in from common import _async, idle, WebAppManager, download_favicon, ICONS_DIR, BROWSER_TYPE_FIREFOX File "/usr/lib/webapp-manager/", line 397, in def download_image(root_url: str, link: str) -> Optional[Image]: File "/usr/lib/python3.10/", line 312, in inner return func(*args, **kwds) File "/usr/lib/python3.10/", line 403, in __getitem__ return self._getitem(self, parameters) File "/usr/lib/python3.10/", line 529, in Optional arg = _type_check(parameters, f"{self} requires a single type.") File "/usr/lib/python3.10/", line 176, in _type_check raise TypeError(f"{msg} Got {arg!r:.100}.") TypeError: typing.Optional requires a single type. Got . deb@mint-lap:~$