Replication Task: b'307' b'Temporary Redirect'

[nas4free-user]

I get an 'Temporary Redirect' Error while saving a new replication task!
Exact Message:
Failed to connect to remote host ws://nas3mvz.mosaiq-dom.com:80/websocket with following exception Invalid response status: b'307' b'Temporary Redirect'
I can scan ssh key (via remote auth token), but when trying to save the config I get that error.

I suppose a network configuration error on the destination server (I have two network addresses), but I don't find the mistake!
Replication to a third server is working fine, network config is the same (all server running FreeNAS-11.2-U5 )

Can somebody help?

Regards,
Frank

 

[nas4free-user]

Found the problem: I switched off http but this was needed for the connection!