I got the ‘exact’ same.
The connection with the server was lost.
Error is 71: Protocol error.
We can reproduce this at all workstations when updating/reinstalling to OpenSUSE Leap 15.0
The rest of the workstations with < 15.0 are working fine.
I will send the logs to forum[at]nomachine[dot]com
A solution would be appreciated.
Thanks in advance.
Best Regards,
Tim