When starting factorio with the Cargo Ships mod and the Beautiful Bridge Railway mod, it produces an error while loading:

Failed to load mods: entity prototype "rail-chain-signal" (rail-chain-signal) collision mask does not collide with entity "buoy" (rail-signal).
rail signal collision masks mus collide with all other rail signals.
rail-chain-signal modifications: Base mod > Beautiful Bridge Railway
buoy modifications: Cargo Ships

You may need to have BBR dev fix it since I had the same problem with SE and he was able to fix it.

Informed the BBR dev about the problem: https://mods.factorio.com/mod/beautiful_bridge_railway/discussion/5fc4e8a56525d862f0777f76