Error InvalidAuthenticationAudience when calling a Custom API from a Canvas App

Hello, we are getting this error when calling a Custom API in our dev environment:

"response": {
          "error": {
            "code": "InvalidAuthenticationAudience",
            "message": "The received access token has been obtained from wrong audience or resource 'https://xxx.crm4.dynamics.com/'. It should exactly match (including forward slash) with one of the allowed audiences 'https://service.powerapps.com/','https://apps.powerapps.com','https://apps.powerapps.com/','https://apihub.azure.com','https://api.powerplatform.com'."
          }
        }

"_serviceType": "connector",
      "_suggestedErrorMessage": {
        "message": "One or more of your connections may not be authenticated. Please restart the app to fix this."
      },
      "_diagnosticMessage": "The received access token has been obtained from wrong audience or resource 'https://xxx.crm4.dynamics.com/'. It should exactly match (including forward slash) with one of the allowed audiences 'https://service.powerapps.com/','https://apps.powerapps.com','https://apps.powerapps.com/','https://apihub.azure.com','https://api.powerplatform.com'."
    }

The Power FX code is:

Environment.book_api(
            {
                qId: Quote.Quote,
                qoId: Option.'Quote Product',
                bill: varBill
            }
        );

Our environment is in North Europe, which should not have an impact.

No repository files, tests, or entry points are named. Start by reproducing the shown Environment.book_api call and inspect the InvalidAuthenticationAudience diagnostic; done means locating the relevant connector or authentication handling and establishing a repository-specific reproduction or confirmed cause.