I had this same error on two different computers. It’s possible that being logged in to both at once was the problem? When trying to generate an image I saw the message that others are describing.
Accessing my history also returned the “Incorrect API key provided” error on the API call but I only know that from looking at the Chrome dev tools. All that was on the screen was the loading indicator.
Logging out and logging in again did not solve it. What did solve it was:
- Logging out
- Holding the refresh button down and selecting “Empty cache and hard reload” (Chrome)
- Logging in again
When I successfully logged back in I saw that the prompt which I had been trying to generate actually went through each time, even though all I saw was the error. I now have 4 result sets for this same prompt and 4 fewer credits. So I am annoyed about that.