Cash Shop items closing game

Description of the bug: (optional screenshot/video): When I select the Crystal Cat Weapon in the cash shop and attack, the game closes. This seems to only happen with the pirate class.
What is supposed to happen?: Weapon is supposed to show its attack animation.
Where did you find and/or notice this bug?: Was showing friends the Donor weapons and their animations, when my game closed suddenly upon using this weapon.
A step-by-step guide to re-producing this bug (optional): Use a pirate character (mine had knucklers equipped, unsure if necessary), go to the cash shop, equip the Crystal Cat Weapon and attack.
Extra information (optional): Probably happens with other weapons as well, I noticed the Cat Pringles closed the game after a few attacks.