Welcome to the Make community!
If the format is correct, which it looks like it does, then the only thing left you can do is to get a new API key from the external service.
The error message says your API key is incorrect.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!