Xls to xml converter issue

Hi,

For the last couple of days, the xml to xls converter is acting weird. Everytime I upload an excel file, i get this error. It says the file is a google sheet, which it is not.

Any leads as to what and why? I tried using files that I have converted even until recently, and the same effect.

Issue persists with offline converter as well. Checked multiple files, all of them are excel and not google sheets

Update, its working fine. What I have shown up there is only an extra statement that tells you that INCASE you plan to use google sheets, these are the alterations needed. Or else, xls is working fine.