Corruption happens. Delete the addon from your global resources and download it fresh using a stable internet connection. An "Invalid Checksum" means the file is corrupted.
To increase game stability and prevent crashes on mobile devices, Mojang locked down how much memory an entity behavior script can utilize. The sprawling code of Crazy Craft routinely violated these new safety limits. The Technical Reality: "Patched" vs. "Broken" crazy craft addon mcpe patched
Find weapons that do hundreds of points of damage, allowing you to breeze through tough mobs. Corruption happens