The issue of service account lookup error in role binding can be resolved by following the below steps:
- Check that the service account and the role binding exist in the same namespace.
- Check that the service account specified in the role binding exists.
- Check whether the service account in the role binding has permissions to access the Kubernetes API resources.
- Ensure that the Kubernetes API resources specified in the role binding exist.
- Check whether the service account in the role binding is correctly specified, with the correct name and namespace.
- Check that the cluster is running and is accessible.
- If the issue persists, try deleting and recreating the role binding.
- Ensure that RBAC authorization is enabled.
If the issue persists, try to get help from the Kubernetes community or seek the assistance of a Kubernetes expert.