Remote desktop connection protocol error 0x112f
This error may be triggered by insufficient memory on RDP server.
After few tries with this error, RDP managed to get a connection to the server and I was able to stop a bogus service consuming too much memory. This can be done also with sysinternals or sc.
Server restart helped, I'm able to connect to server again.
Might not be a solution for all but I found that if I reduced the screen resolution of the RDP session, I was able to get in. The server was at 95% capacity I went from 3 high res monitors to 1 800x600 window.