Weird behaviour since two last weeks

I use MuseScore 3.6.2 portable AppImage inside computers with Ubuntu-Studio 24.04.1 LTS (64 bit Linux).
Since two weeks now (2025-Jan-27) I have a rare problem each time I load and/or save any score in my HDD. The app takes so long time to do it and I can see a not Spanish words inside the save/load panel with a non existing folders (see the appended sample picture).
This behaviour is not present when I use MuseScore 4.4.4 portable AppImage, so... I guess it is not something related with the Linux file system.
What can I do to fix it? ???
Blessings from Chile!!!

Juan