In React, I am getting this following error "Uncaught (in promise) TypeError: Failed to execute 'fetch' on 'Window': Invalid name"

I want to add the new userInputData to the fakeJsonApi however I encounter the error **"Uncaught (in promise) TypeError: Failed to execute ‘fetch’ on ‘Window’: Invalid name" **

The data I fetched from – https://jsonplaceholder.typicode.com/posts

>Solution :

Remove extra space on the Content-type