We could not copy the content to the Clipboard, it is in use by another application. You can still paste your content within this workbook but it will not be available in other applications.

It looks like this problem has been ongoing with other users.

I am running into this error message more frequently now when using Microsoft 365 Excel. This happens in Excel only. The frequency of this error message keeps increasing, I literally have to click all over the spreadsheet to correct the problem. I sometimes save and then click the esc key and it MIGHT work. I even release the cache from the Clipboard by using Win+V, to no result. I have tried keeping less application open for multitasking, but that still doesn't help. I am running Excel on Windows 11. Essentially, I try a combination of any of these or all combination before it slowly gets back to normal.

Does this happen with the desktop version? Anyone?... If I have to move on to that instead of Microsoft 365 Office, it would be worth the effort since I use Excel every day and this bug is becoming an annoyance.

Well, some are basic, and others are much more elaborated spreadsheets (macros) just depending on the project in which I'm involved. By now, and after updating the software to the 2007 version, it seems to be working well. Let's see what happens.

Agree.

mine are bog standard sheets. Have you tried it? My version Excel is the latest Office 365 web version,

This problem has generated some potential solutions, which I would regard as work-arounds, but no definitive solution from Microsoft.

The solutions also differ in the configurations and/or versions of Excel. I do not run Win 11 nor do I use Office 365. I do not use PowerShell. I have basic Excel Pro 2016.

The fact that so many contributors have the same problem across different configurations indicates to me that the problem is endemic. Therefore there should be a single generic solution from Microsoft.