The version this server is currently running will eventually become incompatible with the rest of the XMPP network and XMPP clients (many are already experiencing this with the Conversations app not being able to log in). Unfortunately, attempts to migrate the data to the new server is failing. Unless the package maintainer of this software updates the repo for the operating system, I am strongly advising that you start planning on moving your accounts to a different service provider as this service will eventually fizzle out. The sooner I can see the active users drop to nothing, the sooner I can launch the updated server and maybe you might consider re-registering again. Do not register to this server unless you see version 26.02 or higher as the server version shown on the web page.