Cloud Build validates Java Cloud Functions but deployment fails immediately after validation. What should you check first?

The Cloud Build service account requires the Cloud Functions Developer role to successfully deploy Cloud Functions. If validation passes but deployment fails immediately, it strongly suggests a permissions issue. Cloud Build can validate the code structure without deployment permissions, but it cannot perform the actual deployment without the necessary role. Checking the maximum number of Cloud Function instances is unlikely to be the first step, as deployment failure typically occurs before resource limits are hit, and validation would still pass. Verifying Cloud Build trigger parameters is also less likely, as validation passing implies the trigger initiated the build correctly. Retrying with backoff is a general troubleshooting step but doesn't address the root cause of a consistent permission-related failure.