Unable to select sort column in Calc

Hello all,

I am able to sort in some documents and not others and i’m trying to figure out why. I am familiar with the sorting process but it just doesn’t seem to want to work on one xlsx in particular.

Any Ideas?

They may have placed restriction on the file, try saving as xls, maybe resolve.

For example, if I have tagged a picture, I have no filter option.

With me Windows 10 Home; Version 1809; 64-Bit | LibreOffice, Version: 6.2.3.2 (x64).