Your question is Troubleshoot a Failed Deployment Pipeline. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're working on a deployment pipeline and a release fails during rollout. You need to isolate where the failure happened, whether it came from the build, dependency chain, environment configuration, or deployment step, and decide how to recover safely.
Given a scenario where the deployment failed, how would you troubleshoot the issue?