Good to hear. Yeah RoMON is super useful for getting out of these "bad bridge" configurations.
At end of day, it's the "duality" of the "switch CPU port" that it is both a bridge port and parent interface, see RouterOS bridge mysteries explained and Bridging and Switching - RouterOS - MikroTik Documentation with the gory details.
If I have to guess... presumably you were on your VLAN 10 and/or VLAN 100 when trying access it. And since VLAN interface go through the "switch CPU port", there going get dropped by the frame-type to admin-only-untagged... on bridge interface, so VLAN packets from CPU (which includes any /interface/vlan's) aren't going to get into the bridge. Why I said "no VLAN will work".
Perhaps, if you had an /ip/address defined on the bridge interface and/or used an untagged path from any AP/switches to the router you might have been able to get in without RoMON.
You're welcome to post config from export file=config.rsc. But it's kinda like on a test on how well you understand internals of Bridge VLAN filtering, and specific matter to answer more exactly.