Latest Log: https://gist.github.com/Yourname942/c221044542cea6cebe8cda9434b8435b
Crash Log: https://gist.github.com/Yourname942/d3bc45fa46c3a331352f9e34f2524375

Minecraft: 1.15.2
Forge: 31.2.36
BonsaiTrees: 2.1.2.6

Launch Twitch App
Click Play (purple button in Twitch App)
Click Play (green button in Minecraft Launcher)
Crash occurs while Forge is loading mods (I think)

Sorry, I'm personally not supporting any versions below the upcoming 1.18.1 version.
Maybe someone else wants to pick things up for older versions - I simply don't have the time.