Drag and Drop not working in Golden Gate

Have you rebooted your Mac? If not, that's the first step. If that does not help, then see if the problem is present when you boot in safe mode. That process performs some system cleanup and clears caches, andalso disables 3rd party extensions that may cause problems.

Start up your Mac in safe mode - Apple Support

If that does not correct the issue, test in a new user account. A newly-created user account will have all settings at default, and if the issue does not occur in that new account then it provides guidance on what may need to be changed to correct the issue.

Add a user or group on Mac - Apple Support

Once the testing is complete, the new account can easily be deleted.

Delete a user or group on Mac – Apple Support

Those steps will help to isolate the problem.

It might help to download and run EtreCheck, written by a long-time forum member. The free version is fine. Post the full report using the Additional Text button. No personal information is revealed.

Drag and drop of files and folders in Finder works as always on macOS 27 Golden Gate.

There was a previous similar post and the reason there was Stacks was enabled on the Desktop. Stacks automatically sorts items into virtual folders of similar items. You can’t move items around on the Desktop with that enabled. If you ctrl -click on the Desktop, you can disable it from the contextual menu.

I did reboot multiple times. This started when I updated to OS 27. I have Apple Care so I'm going to contact them or set up an appointment at an Apple Store. At this time this laptop is useless to me. Thank you for your help.

Thanks. I don't use stacks and I tried what you recommended with no luck.