There's recently an update on Excel and the following problem occurs.

I am trying to have this file shared/unshare, but the “Unshare workbook” is greyed out. When I googled, I found it says that it could be because there's something protected in the workbook.
When I dive in further, it says there’s protected sheet. So I found out there’s this “Habenero” protected sheet but it isn't one of the hidden tabs and I cannot locate it.
Help?


Excel version: 2016
Detailed Microsoft Office 365 ProPlus version: 16.0.11328.20230
Excel issue.jpg