Just another crash: Click for crash report and all will be explained!

Testing 0.44.0 on 1.12.2 with obfuscate 0.4.2 works fine for me (with optifine HD_U_F5, and asides from the gas issue at #270) there seems to be another mod that is causing the issue, what is the mod list?

Check the crash report because who has time to write out 343 mods?

Seems to work fine on 0.43.5 though.

If you don't have the time to write out 343 mods, who has the time to figure out which mod is causing the issue. I will tell you right now that nothing major changed in the new update, it's just another vehicle in the mod. The fact that it's saying java.lang.NoClassDefFoundError on the ATV is concerning and it's most likely caused by one of the 30 core mods you have installed. Also you should start playing the game on a more modern version of Minecraft, I won't be supporting 1.12.2 much longer. Please don't reply "but more people play on this version" or something along the lines.