i get 403 error and i you not subscribed to api but i subscribe the api

How can I fix the error with gifurl output to display a gif when I click on it? I get a ERROR Unexpected end of JSON input SyntaxError: Unexpected end of JSON input at fetchData and undefined error when I click on an exercise.

The POST method cannot connect to the api

type of db used

License, download

gifUrl issues

its only fetching 10 exercises of particular kind

403 error

Gifs background

403 error