I still can't reproduce the issue. Here's what I tried:
- Cleared the API key input and clicked on save
- Paste the new key
- Clicked on Check key, correct message appears: Please save an API key
- Clicked on the Save button, key saved, now everything works OK.
I've also tried replacing the already inputted API key with a new one, and clicking on the Check key button before clicking on the Save button, but in this case the old API key is checked correctly.
Can you please write a step by step procedure on how to reproduce the issue?