What fast debugging actually looks like on Upsun

Debugging a broken deployment can take hours, especially when the cause is unclear. Recently, a customer ran into this exact situation: their AI agent produced a Drupal site with broken composer scripts and mismatched database credentials, and nothing they tried got it running. 

This video shows how debugging works in practice on Upsun. Our Developer Advocate, Paul Gilzow, walks through this real example from start to finish, covering each step:

• Starting with the logs to pinpoint the errors.
• Inspecting the application container to see what the AI generated.
• Comparing the broken project against a clean Drupal install.
• Pushing targeted fixes one at a time until the site was live.

The whole process follows a consistent pattern: investigate, isolate, fix, validate. Each change is small, testable, and safe to try because Upsun gives you isolated environments that are clones of your production setup. 

If you want to see a real support case go from first error to working site, watch the full walkthrough above. 

Also, if you want to try this workflow yourself, you can start a free Upsun trial and spin up your own project in minutes.