FYSETC F6 v1.3 Marling 1.1.9 TMC2130 M122 not working (no replies)

Hi All, first time on the forum.

Been plating with the FYSETC F6, loaded Marlin on it, looks like like it's working, but there are some issues.
I tried running M503 command and it fails:

SENT: M503
READ: echo:Unknown command: "M503"
Unknown command: "M503"
READ: ok

I then move forward and enabled TMC_DEBUG, but M122 S0 has the same output:

SENT: M122 S0
READ: echo:Unknown command: "M122 S0"
Unknown command: "M122 S0"
READ: ok


Anyone else having this issue or know how to correct them? I've not fully connected the board, just loading it from the USB power.

Thanks,