Ok, not sure what is going on now, but I played just fine for 2-3 missions with some Tanks, but now the missions crash after loading if I have a Tank in the squad. All of my Tanks are Tech Sgt or above, but even trying a fresh soldier as a Tank crashes the game. I tried resubbing but nothing has helped, and I can't quite figure out what's going it. Is there something in the LW2 AWC that could be conflicting??

I haven't installed any new mods/content since this mod. Strange that is sort of just stopped working once the soldiers reached a certain level.

There should be no conflict and there should be no reason to crash. It does not matter if you installed new mods or not, as others can become updated anytime. For me it looks like you have probably a bad mod configuration. Try alternative mod launcher and see if you have a confilct with a other mod. First go and make this guide: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=625230005 If that does not solve your problem then you can try this link: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=683218526

I'm having the same issue as the Professor. I have no idea why all of a sudden the tank class started crashing the game on mission load

You probably have a mod conflict. I doubt it is the tank class because it is not overwriting any base game code. Can you fo into more detail? Was it aftert a special ability promotion? Or does it happened suddenly? Again i do not think it is related to this mod, but i try to help where i can.

[0177.85] ScriptWarning: Accessed None 'UpgradeTemplate'
X2Effect_TankClassLW2CombatDrugs Transient.X2Effect_TankClassLW2CombatDrugs_0
Function TankClassLW2.X2Effect_TankClassLW2CombatDrugs:FindUpgradeItemTemplateName:0111

I had the same problem