Comment # 1 on bug 1222190 from Freek de Kruijf

(In reply to Freek de Kruijf from comment #0)
> I do not get email from cron jobs anymore.
> journalctl -u cron.service shows error message:
> 
> pam_kwallet5(crond:session): pam_kwallet5: not a graphical session,
> skipping. Use force_run parameter to ignore this.

Receiving email from cronjobs is OK. Still get the error messages in the
journal. It can be prevented by having a file /etc/pam.d/login with content:

auth    optional        pam_kwallet5.so
session optional        pam_kwallet5.so auto_start force-run