Microsoft Excel can’t insert new cells because it would push non-empty cells off the end of the worksheet. These cells might appear empty but have blank values, some formatting, or a formula.

If you Can't type numbers or formulas or enter data into Excel cells then it might be a problematic Add-in causing the problem. Here are some working fixes that may help.

Can't See Columns in Excel. Over the course of a long night, you prepared your spreadsheet. However, when you looked at it the next morning, you find that you cannot see several columns.