the latest flatpak from flathub doesn't launch
the latest flatpak from flathub doesn't launch at all neither from the terminal not the app icon and all the required runtimes are installed this is the error it prints out
➜ flatpak run org.pitivi.Pitivi
Gdk-Message: 00:42:14.826: Unable to load tcross from the cursor theme
Traceback (most recent call last):
File "/app/lib/python3.9/site-packages/matplotlib/backends/backend_gtk3.py", line 43, in <module>
cursors.SELECT_REGION: Gdk.Cursor.new(Gdk.CursorType.TCROSS),
TypeError: constructor returned NULL
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/app/bin/pitivi", line 172, in <module>
_run_pitivi()
File "/app/bin/pitivi", line 143, in _run_pitivi
from pitivi import application
File "/app/lib/pitivi/python/pitivi/application.py", line 33, in <module>
from pitivi.mainwindow import MainWindow
File "/app/lib/pitivi/python/pitivi/mainwindow.py", line 29, in <module>
from pitivi.editorperspective import EditorPerspective
File "/app/lib/pitivi/python/pitivi/editorperspective.py", line 41, in <module>
from pitivi.timeline.timeline import TimelineContainer
File "/app/lib/pitivi/python/pitivi/timeline/timeline.py", line 38, in <module>
from pitivi.timeline.elements import Clip
File "/app/lib/pitivi/python/pitivi/timeline/elements.py", line 32, in <module>
from matplotlib.backends.backend_gtk3cairo import FigureCanvasGTK3Cairo
File "/app/lib/python3.9/site-packages/matplotlib/backends/backend_gtk3cairo.py", line 6, in <module>
from . import backend_cairo, backend_gtk3
File "/app/lib/python3.9/site-packages/matplotlib/backends/backend_gtk3.py", line 49, in <module>
raise ImportError(exc) from exc
ImportError: constructor returned NULL