WebDAV: Error Dialogue: Error during Authentication

I cannot log into my WebDAV account. I enter the correct URL, username and password but always get this error message (sorry, it’s in German):

title:Fehler während der Authentifizierung
content: Fehler beim Versuch, sich bei WebDAV zu authentifizieren: AuthException{code: AuthExceptionCode.linuxAppArmorDenied, message: Failed to lookup secret: An AppArmor policy prevents this sender from sending this message to this recipient; type=“method_call”, sender=":1.130" (uid=1000 pid=6560 comm="/snap/authpass/1104/authpass" label=“snap.authpass.authpass (enforce)”) interface=“org.freedesktop.Secret.Service” member=“OpenSession” error name="(unset)" requested_reply=“0” destination=":1.4" (uid=1000 pid=4210 comm="/usr/bin/gnome-keyring-daemon --foreground --compo" label=“unconfined”) (9) (g-dbus-error-quark)}
OS: linux Linux 6.8.0-52-generic #53-Ubuntu SMP PREEMPT_DYNAMIC Sat Jan 11 00:06:25 UTC 2025
App Info: AuthPass (1.9.7+1940) [design.codeux.authpass.linux]
Device: {name: Ubuntu Core, version: 18}

This is on a fresh Ubuntu 24.04.1 LTS install.