Using Excel for Mac on Office 365, I am trying to add a new sheet to a complex workbook. When I click on the + to add a new sheet, I get a popup message "This action won't work on multiple selections" and am unable to add a new worksheet. Additionally, I am able to copy but not paste values, text or data outside of the worksheet and receive the same error message. Has anyone heard of this issue and more importantly what is the fix?
Alert Error.png
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