Simple "Add-to-Archive" no more working

Since updating to the last Beta (12.26.1) the "fast" button for adding a folder to a new archive - right-click dropdown menu "Compress to [foldername].zip, or even "Compress to zip + options" - does not work at all - i.e. it doesn't have any effect.
Could that be a local problem of my installation ? (i.e. a missing plugin opr similar) ?
It worked perfectly utnil - say - a couple of months ago !
Any simple way to check and correct ?
the sub-menu, dropdown "Archives Directory Opus" / "Add to archive" works perfectly: what's the difference ?

The menu item that doesn't work is probably not from Opus if the Opus menu item is in a sub-menu. The Opus menu item only appears in one place or the other, depending on configuration, not both.