Excel 365 no longer allows me to insert columns/rows by right clicking and hitting "insert"

In Excel 365, I can no longer highlight a row and right click to add a new row.  I'm not able to add a new column either. This was working this past Friday when I logged out. I'm not able to find a way to activate that feature again. It appears that I can add a row or column by using the menus up top.

I also verified that I have nothing in the last row or column in excel. This happens in a new spreadsheet with only 2 cells with data.