decktalk check reports it when it judges the project’s files before a build, decktalk record when it records the pages, and decktalk verify when it measures the finished film and reads back each recording log.
Pass --allow PAGE_FRAME_THREW to carry on past it, and --fail-on to choose which severity fails a run.
What to do
Fix the function handed toDeckTalk.frame. Open the page with decktalk serve, and the browser console shows what it threw.
Troubleshooting says more under A recording that opens black or runs short.