To fix the trooper armor bug go to:

C:\Program Files (x86)\Steam\steamapps\workshop\content\268500\618090572\Config

then open the Xcomclassdata.ini and under the line:

[Jack X2SoldierClassTemplate]

copy and paste these words:

AllowedArmors=soldier
bAllowAWCAbilities=1


(AllowedArmors=soldier means that they can equip armor)

and

(bAllowAWCAbilities=1 means so they can get their AWC hidden abilitys)

YOU HAVE TO COPY AND PASTE I DOES NOT WORK IF YOU TYPE IT IN YOURSELF

have fun ;)