hello , im starting this discussion to post the .ini edits that are required to fix some of the bugs , these fixes are temporary and im sure most of these bugs will be fixed by the next update.

first to find the mod's .ini files open steamapps -> workshop -> content -> 268500
-> 644076161 -> config

the config file should contain the .ini files

here is the list of bugs that can be fixed with .ini edits

- unequipable weapons on the viper :
1. go to XcomClassData.ini
2. find this line :
+AllowedWeapons=(SlotType=eInvSlot_PrimaryWeapon, WeaponType="PA_ViperGunCat, rifle")
3. change the line to :
+AllowedWeapons=(SlotType=eInvSlot_PrimaryWeapon, WeaponType="PA_ViperGunCat")
4. add this line below it
+AllowedWeapons=(SlotType=eInvSlot_PrimaryWeapon, WeaponType="rifle")
5. save the changes

this edit should allow the viper to use normal rifles and the custom viper beam rifle(unlocks when purchasing plasma rifle upgrade)

-unequipable reinforced mec armor
1. go to XcomClassData.ini
2. find this line :
+AllowedWeapons=(SlotType=eInvSlot_SecondaryWeapon, WeaponType="shoulder_launcher")
3.add this line below it
+AllowedArmors="soldier" ;
4. save the changes

this edit should allow the MEC to use its reinforced armor ( appearance doesnt change though)