@AnabelBerumen said:
error invalid API key
api 3
1.- Error: Network Error

Check the developer tools console, it might have more information on the error.

If you are using an Ad blocker, it is possible your Ad blocker is blocking the request.

(Im not using an Ad blocker)
4 latest

{ "status_code": 7, "status_message": "Invalid API key: You must be granted a valid key.", "success": false }

You are probably sending your API Request directly from the Developers page.
https://developers.themoviedb.org/3/getting-started/introduction
Developers.themoviedb.org is hosted by https://stoplight.io/
And yes, he's in trouble.
This is the error response I get on developers.themoviedb:

Response    503 Service Unavailable  

Error: Network Error  
Check the developer tools console, it might have more information on the error.  
If you are using an Ad blocker, it is possible your Ad blocker is blocking the request.  

But if I use the URL directly in the browser I get the correct answer.

Travis Bell, the Manager, said (2021-01-15):
https://www.themoviedb.org/talk/600184fc6aa8e0004077e364?page=1#6001bbacbe4b36003d514ac3

Hi @ user,
I believe Stoplight has temporarily blocked the Try it out feature for our account
because too many people were using it as the source for their apps,
and not using api.themoviedb.org for some reason.
No timeline on getting it restored, but that's the problem.
Switch to use our proper production address, api.themoviedb.org.

As for the other error, Invalid API key, please ...

In order for someone to help you with API Request questions,
it is critical that you post here the API Request you are using.
Remember to replace your Key with THE_KEY , or something like that.

There is probably a small error in your API Request.

are you using the api_key a query parameters?

@AnabelBerumen said:

api 3 1.- Error: Network Error

Check the developer tools console, it might have more information on the error.

If you are using an Ad blocker, it is possible your Ad blocker is blocking the request.

(Im not using an Ad blocker) 4 latest

{ "status_code": 7, "status_message": "Invalid API key: You must be granted a valid key.", "success": false }

hey, @AnabelBerumen did you solve the error