How do you debug a failed build?
The docs indicate there is a build log but there simply isn't one in the UI
dash.cloudflare.com/ACCOUNT_ID/pages/view/PROJECT/DEPLOYMENT_ID where the deployment ID looks something like a398d794-7322-4c97-96d9-40b5140a8d9b).compatibility_flags cannot be specified without a compatibility_date
dash.cloudflare.com/ACCOUNT_ID/pages/view/PROJECT/DEPLOYMENT_ID