In Linux Ubuntu Inkscape from Snap, version 1.3.1 (9b9bdc1480, 2023-11-25, custom)

When trying to export, there is no way to specify the filename (button to open a file browser does not work either). So export results in "you have to enter a filename" :-(

I tried with inkscape 1.4 from ppa, could not make it open (some incompatibility with the Cairo library)

I tried in headless mode: 'inkscape --export-filename=out.pdf myfile.svg'
it gives me an error "Failed to open" whereas the file was created with inkscape itself and saved as inkscape SVG ...

Don't know what else I can try, it is so frutrating to be blocked by something as simple as entering a file name :-(

please advise

nicolas