How to connect to openfire?

Question

linux

What needs to be configured in Linux (Rosa Linux KDE-Plasma) in order to correctly connect to the internal jabber server?
Jabber server - Openfire, configured on win2003R2. From Windows XP, 7, 8, 10 under the client "Miranda" connects and works fine. Also under Ubuntu 16.04 in any client - it connects and works. But in Rosa Linux with the Plasma shell, it does not connect, the jabber client reports the following "Authentication error on the server: No appropriate authentication mechanism is available.
Offered mechanisms: GSSAPI" (PSI, Kopete)
What else can I see, where to dig?

Answer 1

If I remember correctly, you need to export the server certificate from an already running client. And import it into the non-working client.