Minecraft v1.15.2
Forge v31.2.36
Double Slabs v2.11.8
Vanilla Magic v2.0.2

Most of the time when trying to launch the game, my game crashes after less than a minute of loading. Seems to happen more if vanilla magic is installed?
Crash Report

Seems like DSBlocks.DOUBLE_SLAB.get() returns null.

https://github.com/CJMinecraft01/DoubleSlabs/blob/1.15.x/src/main/java/cjminecraft/doubleslabs/client/proxy/ClientProxy.java#L96

Apologies for the delay, this is now fixed in the latest version :)