I'm not sure if the following bug is related to what you're encountering, but it relates to the non-functionality of the mod currently - For the file "prototypes/base_mod/entity/transport_belt.lua", it complains of one of the icon_size variables not being an integer. Consequently, the only option it gives you is to disable the mod.
I checked and on line 283 there's a line that reads "icon_size = {32, 32}". Once I changed that so that it read "icon_size = 32", the game started perfectly fine. And now the only graphical issues I'm having is with a different mod I just installed (specifically the ZRecycling mod).