I don't know what's going on, sadly I couldn't figure it out but it's throwing a fit about the following:

Failed to load mods: _ beltlayer _ /prototypes/bpproxies.lua: 3: attempt to index field 'table' (a nil value) stack traceback: _ beltlayer /prototypes/bpproxies.lua: 3: in main chunk
[C]: in function 'require' _ _beltlayer _/data-updates.lua: 2: in main chunk

I don't know how to find the logs so I'll be happy to provide them if you can tell me how to find them. But at present your mod doesn't work with what I have which is a shame because all the others of yours work great and I really could use this one.