Nitopack and Cloudflare integration: Authentication error 1000

I am getting an error in Nitropack saying “Cloudflare Integration disconnected. Your Cloudflare credentials are invalid. To continue enjoying benefits like fast loading times and visually consistent user experiences, please update your Cloudflare credentials.”

Nitropack confirmed that the credentials are correct and after investigation they told me that there is Error 1000 related to authentication and API between Nitropack and Cloudflare.

Anyone has any ideas how to fix it?