We are currently experiencing downtimes of the movim.eu XMPP server (and related services like Pubsub or Conferences) for several weeks now. This is having a serious impact on the availability of the platform (and, by extension, Movim related instances) for many of our users. We are deeply sorry about that.
The exact reason of those downtimes is not known for now (it seems to be related to the Pubsub module of the server). The movim.eu XMPP services are running on top of the Metronome XMPP server that is not maintained anymore since 2016.
We are currently working closely with the ejabberd XMPP server team to migrate the whole XMPP infrastructure in the upcoming weeks to this new server. This migration will also bring more stable and new features (especially regarding the Pubsub part) to the existing platform.