@Marvin failed to authorize: failed to fetch anonymous token:

The issue you're experiencing with the error message "failed to authorize: failed to fetch anonymous token" seems related to Docker's inability to pull a required container image due to authorization problems, specifically an anonymous token fetching failure. This is highlighted in a GitHub issue #11637. ### Steps to Resolve: 1. Check Docker Hub Access: Ensure that Docker Hub is accessible from your environment. Sometimes network issues or Docker Hub service issues cause token fetching errors. 2. Authenticated Docker Hub Access: Consider logging into Docker Hub using

docker login

to ensure that the image pull doesn't require an anonymous token. 3. Retry: Sometimes transient network issues cause such errors. Retry the operation after some time to see if it resolves the problem. 4. Audit Docker Configuration: Double-check your Docker configuration to ensure that all settings (like proxy settings if any) are correct. 5. Update Prefect Versions: Ensure you are using the latest version of Prefect and Docker to benefit from the latest bug fixes and improvements. Further troubleshooting might involve looking into network logs or Docker logs to diagnose specific issues related to network access or authentication. For more detailed guidance, refer to the full GitHub issue #11637 that may have additional context or solutions from other users facing similar issues.