Nextcloud Talk temporary password issues for guest users

Hello guys,

I have latest Nextcloud 18.0.2 running on Ubuntu 18.04 LTS. My installation runs behind a pfSense firewall with internal TUN server. Everything works as expected also with TOTP two-factor-authentication. I don’t force TOTP for all users!!!

My problem currently is that I would like to start Talk meetings and invite also guest users by sedning them the link to the meeting. In this case I want to set a password for the Talk meeting which is unfortunately not working.

You will be asked for the password but the password is not accepted. I also disabled the TOTP to verify if this problem is related. But also disabling TOTP does not fix the issue.

Any ideas about that?

Best regards