CS50: Crack - 'incompatible pointer types' error

Question

I'm getting an 'incompatible pointer types' error when I try to compile my code. Wondering if anyone can help me figure out why?

Here's my code and the error:

Answer 1

The crypt function needs a pointer to key, however you are passing a pointer to pointers, or an array of pointers, or word **, that is not the expected type