Description of problem:
Tried to open a file from a folder shared by / saved on Tresorit. "Could not open file". Since then I can't open ReText any more.

Version-Release number of selected component:
retext-7.1.0-5.fc34

Additional info:
reporter:       libreport-2.14.0
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/app-gnome-me.mitya57.ReText-3364.scope
cmdline:        /usr/bin/python3 /usr/bin/retext
crash_function: detectFileEncoding
exception_type: OSError
executable:     /usr/bin/retext
interpreter:    python3-3.9.4-1.fc34.x86_64
kernel:         5.11.18-300.fc34.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
tab.py:320:detectFileEncoding:OSError: [Errno 5] Input/output error

Traceback (most recent call last):
  File "/usr/bin/retext", line 33, in <module>
    sys.exit(load_entry_point('ReText==7.1.0', 'gui_scripts', 'retext')())
  File "/usr/lib/python3.9/site-packages/ReText/__main__.py", line 131, in main
    window.restoreLastOpenedFiles()
  File "/usr/lib/python3.9/site-packages/ReText/window.py", line 396, in restoreLastOpenedFiles
    self.openFileWrapper(file)
  File "/usr/lib/python3.9/site-packages/ReText/window.py", line 861, in openFileWrapper
    self.currentTab.readTextFromFile(fileName)
  File "/usr/lib/python3.9/site-packages/ReText/tab.py", line 338, in readTextFromFile
    encoding = self.detectFileEncoding(self._fileName)
  File "/usr/lib/python3.9/site-packages/ReText/tab.py", line 320, in detectFileEncoding
    raw = inputFile.read(2048)
OSError: [Errno 5] Input/output error

Local variables in innermost frame:
self: <ReText.tab.ReTextTab object at 0x7fe58803f430>
fileName: '/home/martin/TresoritDrive/Martins tresor/mystuff/infos_projects/datacube/the_containership.md'
chardet: <module 'chardet' from '/usr/lib/python3.9/site-packages/chardet/__init__.py'>
inputFile: <_io.BufferedReader name='/home/martin/TresoritDrive/Martins tresor/mystuff/infos_projects/datacube/the_containership.md'>