Game crashed when i added base metals, modern metals, mmdorespawn and [mmdlibs.]
crash-2019-05-24_22.57.20-client.txt

-ERR_NOT_A_BUG

java.lang.RuntimeException: Invalid id 4096 - maximum id range exceeded.

Your pack officially has more blocks than Minecraft 1.12 and prior can have without using a mod such as "Not Enough ID's" - not a bug in any MMD mod. Closing.