when I start the program, I get the Loading certificate cache message that never seems to stop.
Thanks for your report. To have a better overview let's track this in 381910 *** This bug has been marked as a duplicate of bug 381910 ***
Andre, this is a different platform than 381910 I had this same issue on windows, and the problem was that there are several lock files in the %HOME%\AppData\Roaming\Gnupg folder that cause Kleopatria to hang while loading the certificate cache. I corrected this issue by removomg them before starting Kleopatria Specifically gnupg_spawn_agent_sentinel.lock