i was trying this mod for 1.12.2 and it crashes
Using AE2 rv5 Alpha 7

crash report : https://pastebin.com/eUqBm4T2

Caused by: java.lang.NoClassDefFoundError: cofh/redstoneflux/api/IEnergyContainerItem
Install RedstoneFlux.

so while doing some testing yesterday I removed the RF API..after re-adding I forgot to make it optional is all..will get a fix out today...for now, as covers said, just add the RF API via Curse/Twitch