Failed to load mods: productivity-technology-limit/data-final-fixes.lua:3: Producitvity of maraxsis-sand-extraction is changed by more than one technology (mining-productivity-1 and mining-productivity-2) [Please ask IsaacOscar to add support for this]
stack traceback:
[C]: in function 'error'
productivity-technology-limit/data-final-fixes.lua:3: in function 'unimplemented'
productivity-technology-limit/data-final-fixes.lua:21: in main chunk

I had to completely rewrite the mod, but it should work now.

It seems to be working now, Thanks!!