Hey there! I tried investigating your issue but I wasn't able to reproduce this.

I updated my shlink instance to the latest version, created a new API key, and tried using the new API key and verified that new API key works.

Can you go to the support website in the description and file an issue with detailed steps on what you did and where you got stuck?

Thanks!

And for future reference, I'm just a random person unrelated to the project (hence the "unofficial" in the description!) that felt like this would be useful and that others would find useful. Not sure what you felt entitled to, but calling it "useless" with a one-star review isn't constructive!