Hmm maybe not compatible :? Cause when i try to understand the code and the description he give, i see that he remove the requirement of classes and change the place to buy some class, also he warning that if you already change the requirement of classes it may not work properly
At first i was thought that mod will work as remove entire requirement codeline but when i check it actually just remove the specific requirement to access the classes and change the way to get the class by buying in guild, so if your mod already change the classes requirement it will not work