Created attachment 173529 [details]
Error message (in German) reporting a password safe isn't available.

SUMMARY
KMail inside Kontact installed as a flatpak can't save passwords for receiving accounts.

STEPS TO REPRODUCE
1. Install Kontact as flatpak (with Debian?)
2. Add an account to KMail

For error message:
3. Go to KMail config dialog
4. Go to "receive" tab.
5. Doubleclick on connection -> error message will be shown (twice)

OBSERVED RESULT
No account is added to KMail as it should be (with folders and so on), receiving emails does not work.

EXPECTED RESULT
Account folders are added, receiving emails works.

SOFTWARE/OS VERSIONS
Kontact Version: 6.2.0 (24.08.0)
KDE Frameworks 6.5.0
Qt Version 6.7.2

Host-OS with flatpak:
Linux/KDE Plasma: Debian 12 KDE Plasma
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION
- KMail was installed via Kontact suite from flatpak.
- Password saving in KOrganizer and KAddressbook works as expected.
- I tried it with two different e-mail accounts, both didn't work with same error.
- Sending emails works as expected.