Fix a preview or PDF problem

Correct any highlighted field first. If Sheetroo cannot generate every requested item, reduce the quantity, enlarge the relevant layout or choose a simpler input. It should not silently claim a partial output succeeded.

Keep the page open, correct the settings and wait for the Output ready summary before downloading again. If the browser blocks a download, allow downloads for this site and retry the same action. Refreshing the page can discard unsaved custom text.