Specifiche delle chiavi API utente

Hey guys. I was using User API keys for logging using a third party client. It used to work just fine. But now im getting an error message in some sites

The message is

Oops
The software powering this discussion forum encountered an unexpected problem. We apologize for the inconvenience.

Detailed information about the error was logged, and an automatic notification generated. We'll take a look at it.

No further action is necessary. However, if the error condition persists, you can provide additional detail, including steps to reproduce the error, by posting a discussion topic in the site's feedback category.

Was there a change in this feature in the last versions?