Client Disappeared from Systray, "nextcloud.gui.application: Already running, exiting..."

ℹ️ Support
2

UPDATE: I did not see that I still had a background process running. After exiting I got a new error. Created a new topic for this one!

I’ve got this same problem. Downgrading to 4.0.4 does not work either.
I’m on Debian Trixie with KDE