Right now all communication between the two servers has been disabled so the instance is still working but the media are not.
In fact, as the main server also stores recently used media, you can still see avatars and recently posted media but you cannot upload anything.
This should be hoped in next hours. Updates will be posted here when the situation evolves.
More technical (and personal) info coming soon on @TheKinrar account. (in French, but you can still ask in English)