Be warned, it will probably be a week or so until I can actually work on it, but I've learned the history: it seems that the shallow water fix mod was broken by one of the Factorio updates to collision layers and that's actually showing up as errors in the random other mods -- but it's just a coincidence that those other mods are the first ones doing proper collision checking using the new system.
So the fix will be to basically make my own fix but doing it the right way -- I'll just have to learn what the right way is first 😊