Hello yokota,
> Please try to re-install those libraries to recover this error. > You can re-install "libqt6core6" and "libqt6network6" packages with > this command. > >> sudo apt reinstall libqt6core6 libqt6network6 I tried that and even restart my computer again but no sucess, the same result. thinking now it is related to Qt which Im studying in the moment so it might really be something by my fault but the weird thing is that I remember using calibre yesterday... maybe it was already opened when I messed up with Qt. -- Gabriel B Chuede
