On the last days I found some google-sheets questions that have a link to demo spreadsheets that were moved to the owners' trash.
The textual message shown when opening any of these spreadsheets is:
File is in owner's trash
You won't be able to access this file soon.
If you still need access, please download it or copy and paste its contents.
In the specific case of Filter & Sort with merged cells / groups of rows this question has around 8 months old, has 0 score, has an answer that look more as comment than an answer with a score of -1.
The question doesn't include a screenshot of the demo spreadsheet or other mean to show the spreadsheet structure and content.
What should we do on these cases?