My recommend for the OP is to install the Flatpak version of calibre it should be supported from the system software installer.
It should be updated to calibre 9.10.0 this week--the calibre Flatpak maintainer seem to wait to make sure no issues turn up with new versions.
https://knowledgebase.frame.work/en_...ite-H1Z3HcO3Jx
h
ttps://flathub.org/en/apps/com.calibre_ebook.calibre
bernie