YouTube Api V3: Access not configured

Question

The api key I used was deleted by the Person who gave it to me, no big deal, I can generate my own one.

I created the Project, activated the Access to the YouTube api, created my key and tryed to use it in my Project.

At first I got the message, that the key would be bad or was non existing. After a few minutes, the key seemed to be registered, but now i get a different error message:

   domain: 'usageLimits',
   reason: 'accessNotConfigured',
   message: 'Access Not Configured. YouTube Data API has not been used in project 'my Project id' before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/youtube.googleapis.com/overview?project='my Project id' then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.',

When I open the given URL, i just get the overview, where even is mentioned, that the API is activated: Aktivierungsstatus Aktiviert

I tried to delete my key, deactivate the API again, reactivate it, and create a new key. And I added my Domain to the trusted Domains. Tried different restrictions for the calling and the APIs, and even removed all restrictions.

What could cause the problem?

Answer 1

I more or less (didn't) solve the Problem.

After waiting for some days Overall, and recreating keys, reactivating the api and much more, i gave up today. Looked through many tutorials and blog Posts and just did a step by step guide on how to use the api for a WordPress YouTube Plugin.

So, i created a new Project (almost identical Name) on the same Google account, activated the api, created the api key, and on the first try, without waiting or anything, it worked.

3 Steps: - Create a new Project - Activate the api - Create the api key

I dont know why this does not work on my first Project, as i did the exact identical steps.