Hi, I have similar issue.
I followed this simple guide: https://www.youtube.com/watch?v=u2RTfaN5KYk
I used Address Acquisition: Automatic
All worked fine as WiFI on RouterBOARD_SXTsq_5 so the clients are connecting fine and have needed routing, but once set in bridge mode,
I cannot access the webfig anymore, in my case, neither to connect by MAC address by winbox because the LAN network (main router) restricts it.
So what else needs to be done to be able to connect to the AP by webfig after a Quick Set to WISP AP?