I don't know if this mod is causing the issue or not. But when I remove it from the mods folder I don't get the error anymore. I'm not the best at reading crash reports so I hope that you can help me figure this out because I love your mod and I want it in my modpack!

Crash report :
crash-2020-07-19_03.35.58-client.txt

Not sure what my mods would have to do with this. It's java.lang.NullPointerException: Registry Object not present: modularrouters:item_router so modular routers.