Note: this problem happens with AQT v10, but has been fixed in AQT v11.
This error can happen if you have exported to a file in non-native format, then later exported to it in native format.
The Excel file has been corrupted in a minor way; don't worry - your data is still intact!
To fix this problem:
<workbookView xWindow="1635" yWindow="1515" windowWidth="22755" windowHeight="13365" xr2:uid="{546DA524-9A7D-421C-A063-6E7ECA112F10}" activeTab="1" />
<workbookView xWindow="1635" yWindow="1515" windowWidth="22755" windowHeight="13365" activeTab="1" />