So - - here’s the entirety of the error. As you can see I have the Get Player Character connected to the Cast To MyCharacter blueprint (one I just made myself) and it worked - - up until the point where I made a boolean variable called “isAttacking”. Here’s how the error occurred: I made the variable in the “MyCharacter” character blueprint, and WITHOUT COMPILING I went to the AnimBP and connected it to the Cast to MyCharacter node. I tried to compile the AnimBP before the MyCharacter blueprint (Still) and that is what broke the ability to cast for me. Hopefully I’ve helped in pinpointing this issue so it may be fixed in the near future.