The VLAN tab on the Bridge itself.
The only thing that should be done is vlan filtering checked at the end of the config.
The rest leave at default / Pvid=1, ingress filtering=No / frame types = admit all.
I edit in winbox manually line by line OR
use the new terminal window and CLI commands…
Nlot sure why you are having problems setting the /interface bridge port settings…???
Go Bridge MENU, select ports tab etc…