Problem with Kobo Utilities plugin

[nerdy_knowledge]

Hi, I'm using the latest version of Calibre on a fully updated Fedora KDE Plasma. When I install Kobo Utilities, I obviously need to restart Calibre. But after a restart, and even after completely rebooting, I keep getting the same message:

calibre, version 7.13.0
ERROR: Must restart: You must restart calibre before you can configure the <b>Kobo Utilities</b> plugin

Obviously, restarting doesn´t help. Other plugins don´t have this issue; I only have it with Kobo Utilities and Kobo Annotations. I've been researching the problem online, but since there's only a very generic message, it's hard to find a solution online.

BTW, I have access to a Macbook, where the plugins work just fine.

[nerdy_knowledge]

I reinstalled Calibre not from the Fedora repository, but from the downloadpage instead. That solved the problem.