The "insert new worksheet" option is greyed out. There was worksheet protection on the first worksheet (roughly 30+ worksheets in this workbook), but that was removed. No sign that the workbook is protected either.

Can't create a new worksheet via Pivot table creation, and the "Move/Copy" option is greyed out on all worksheets.

No macros are being run as far as I can tell.

Simply no idea why I can't add a new worksheet?