Mini Scout Customization bugged on High Iron Variant

I unlocked the Mini Scout High Iron, I havent unlocked the default one yet. When I try to modify the gun  it does not let me equip any different accessories and the camos charms and stickers are greyed out. I cant even modify it without going to the sniper tab and clicking on it there. If I try to press modify from the favorites tab nothing happens. 

Pls fix