Lobby JoinCode error 16010

"[Lobby]: , (16010). Message: lobby code 'DBDTL7' contains an invalid character 'B' (U+0042) at index 1"

I found this thread
https://forum.unity.com/threads/new-error-code-for-invalid-join-code.1423908/

Update: Turns out you can get this error message by typing in the wrong code / code not being linked to an actual lobby. Hope this helps someone.

R