A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
This may not be the solution in your case but it was in mine:
I was getting the same error message.
Tried everything here and nothing worked.
Realized I had the 2 files open in separate excel windows (I had 2 instances of Excel running).
Closed one and re-opened it in the same Excel window as the other one.
Copy and pasted without a problem.