I have just created an API key and added it to a Wordpress YouTube gallery pluign. The plugin indicates the new API key is invalid.
YouTube Data API v3 is enabled. From the usage graphs, the api hasn't been used. I haven't reached the quota limit.
When I run the API key on Postman, it indicates error 403 Forbidden as shown below. What could be the problem?
{"error": {"code": 403,"message": "The request cannot be completed because you have exceeded your <a href="/youtube/v3/getting-started#quota">quota.","errors": [{"message": "The request cannot be completed because you have exceeded your <a href="/youtube/v3/getting-started#quota">quota.","domain": "youtube.quota","reason": "quotaExceeded"}]}}