Cannot export to "files and folders" anymore


I cannot export to “Files and Folders” anymore.
First I thought it was due to some strange files, but I tested it with a group of 2 pdf files. I can export each pdf and even marked both pdf and can export them. But when I select the parent folder aka group, then the “Export => Files and Folders” menu item is deactivated.

The last export of my database was successfully done with Catalina and Intel. Now I use Big Sur, Apple Silicon M1 and Devonthink 3.6.1. Maybe this is a problem?

Thank you for your help!

Don’t do it from sidebar. Do it from “normal” pane. See capture.

Oh boy, I remember…
Sorry for that

No problem.