"jabber.ccc.de" server preset
When creating an account in Tor Messenger 0.0.5, the server is preset to "jabber.ccc.de". As the XMPP options are hidden by default this probably won't be caught by people who don't know what to look for when authorization with the server fails.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information