Flatpak Desktop Client won't start anymore

Hi there,

recently my Flatpak Desktop Client (com.nextcloud.desktopclient.nextcloud version 3.11.0) won’t start anymore on Linux Mint 21.2 Cinnamon. Nothing obvious has changed in my setup.

flatpak run com.nextcloud.desktopclient.nextcloud 
*** stack smashing detected ***: terminated

I already tried reinstalling the client. How can I fix or debug that?

Cheers,
Chewie