I’m using nextcloud (16.05 in a VM, ubuntu 18.04 x64 with apache 2.4, mariadb 10.4.41, php 7.2.22) behind a haproxy box with ssl offloading and letsencrypt.
The problem, that I have now is, that I can’t register a new Desktop Client for filesync or a mobile device for example, to connect to Nextcloud Talk.
If I try to register a new client / device for an existing user, I get the Error
CSRF check failed. Access denied.
or (on a desktop client) I get a message within the internal IP-Address of my haproxy box.
I think, there is a misconfiguration with my haproxy loadbalancer so far. But I can’t find the reason.
Already registered and activated clients are working properly.
I hope, You can help me or give me some usefull advice.
Thanks in advance.