@singernight307 said:
The API key I applied for cannot be used
The API key I applied for cannot be used.
When testing the connection in the "VIDEO STATION" section of NAS, it shows
"connection failed" and requires "to ensure that the entered API key is correct"“

Take a Test
Using a computer, desktop or notebook.
On some mobile devices this test may not work correctly.
In the URL below, change THE_KEY to your API Key.
https://api.themoviedb.org/3/movie/550?api_key=THE_KEY
Use this example to do a search using a new tab or window in your browser.
You will receive the basic data of the Movie Fight Club (1999)
https://www.themoviedb.org/movie/550-fight-club
If it works, your Key is OK.

When there is a problem, the TMDb Server sends a message.
Can you tell which message the server sent?
Here is a list of possible messages:
https://developer.themoviedb.org/docs/errors

If it does not work, let us know right here.