Game fails to initiate after clicking "play" on the latest launcher for MC 1.12.2.
I am suspecting one or several of my mods are interfering with it (around 40-50)

A profile with ONLY Forgelin and BP works fine.

Crash log:
latest.log

Same as #499.
Though I can't tell from the crash report which mod is shipping the newer Mixin (but it definitely is there), so to workaround simply rename the betterportals jar to start with zzz.