For some reason the STMIX is not reachable in the LAN. Neither OS nor LW can be determined. Also the lock symbol next to the pen is strange.
When you login to assistant via ssh, can you ping the board (192.168.206.200)?
Pls. post RMX config (DIS-BCSU,DIS-CGWB,TDCSU,etc.). Maybe the config is...