Hi @t.leduc,
Thanks for reaching out to the Auth0 Community!
I understand that you encountered an undescriptive error when getting the Management API access token.
I’m glad you resolved the issue after discovering that a Client Credentials Exchange Hook was responsible for the error!
In the future, I recommend using our Auth0 Real-time Webtask Logs Extension to troubleshoot all the custom-code on your account.
If you have any other issues or questions, please feel free to reach out.
Thank you.