Hello Bader,
More information is needed to establish a firm basis for our investigation. Have you at any time deleted the default compute engine account? It cannot be seen on your IAM page in the developers' console.
Have you changed roles and permissions for any of your existing accounts in your project?
Your issue may be solved by re-creating the default compute engine account, following these steps:
- Re-enable the dataproc or compute engine API by running the following gcloud command: gcloud service-management enable dataproc
- Once either of these 2 commands were run, you should refresh your browser's window, and confirm that the default compute engine service account has been re-created.