client crash report: https://pastebin.com/6kdzqtXb

Note: your mod is the only one loaded.

Could you try using the 0.7.1d Alpha version on curseforge to see if that one does the same thing?

still crashes

https://pastebin.com/ghg5m2Yt

I'd check and see what Immersive Engineering did, they have patched but not yet released.

kreezxil, It looks like the problem isn't fixed in Immersive Engineering though the issue has been closed. It is still being recommended to roll back to a prior version of forge. I think it's a forge bug since the change has broken mods that were working fine. I'm sure something has been changed with model handling code judging by the forge changelog. I don't have the 10+ hours it would take for me to bang my head against the wall trying to figure out what's wrong.

Edit: Nevermind. I think I fixed it.

DynamicTrees-1.12.2-0.6.5
DynamicTrees-1.12.2-0.7.1e

Crash with Forge-1.12.2-14.23.1.2576 and higher
The latest working version of Forge-1.12.2-14.23.1.2575

Thanks for the info GreyMamoN. Hopefully when I fix this the changes are backwards compatible.