I somehow managed to corrupt file system. In System settings if I try to select a wall paper the application crashes, and I get bug info about mssing files which seem to have been deleted (things like
warning: could not find '.gnu_debugaltlink' file for /usr/bin/systemsettings
warning: Can't open file /memfd:wayland-shm (deleted) during file-backed mapping note processing
warning: Can't open file /memfd:JITCode:QtQml (deleted) during file-backed mapping note processing
warning: Can't open file /memfd:unknown-usage:QtQml (deleted) during file-backed mapping note processing
warning: Can't open file /memfd:kwin-dmabuf-feedback-table (deleted) during file-backed mapping note processing
warning: Can't open file /memfd:JSGCHeap:QtQml (deleted) during file-backed mapping note processing
warning: Can't open file /memfd:JSVMStack:QtQml (deleted) during file-backed mapping note processing
and similar. Before reinstalling SlimbookOS-K, I'd like to see if there is a way to attempt a repair. Any ideas?