Describes the cause and action for error messages.
Error Message(English)：
sort and filter unavailable
Sort & filter buttons are (suddenly) not available in Excel table ...
https://superuser.com/questions/1298766/sort-filter-buttons-are-suddenly-not-available-in-excel-tabl・・・
Excel will not sort all columns on my worksheet ...
https://superuser.com/questions/1015944/excel-will-not-sort-all-columns-on-my-worksheet
microsoft excel - "Filter by color" has ...
https://superuser.com/questions/1258154/filter-by-color-has-disappeared-from-my-dropdown-filter
office365 - Office 365 Excel > Sort > "My data ...
https://superuser.com/questions/1104794/office-365-excel-sort-my-data-has-headers-grayed-out
Unable to sort rows because Excel 2016 turned ...
https://superuser.com/questions/1027038/unable-to-sort-rows-because-excel-2016-turned-spreadsheet-in・・・
Sort and filter grayed out - General Excel Problems and Solutions ...
http://forums.excelcentral.com/index.php?/topic/725-sort-and-filter-grayed-out/
Excel 2013 Solving Sorting Issues in Excel - YouTube
https://www.youtube.com/watch?v=_c3YhMvZ3Tc
https://www.youtube.com/watch?v=_c3YhMvZ3Tc
Excel Won't Sort Dates Correctly - The Solution! - YouTube
https://www.youtube.com/watch?v=11jwY6syv4E