Here's a screen video showing me trying unsuccessfully to add a bookmark via drag'n'drop and also via the bookmark menu.
Note that in the (other) user account where I already have a bookmarks section and where adding bookmarks works, I get a horizontal black line displayed in the left-hand section when I drag a folder over it. The line moves between other bookmarks as feedback to indicate where the bookmark will be added when I release the button. There is no such line displayed here.
This machine in the video is one that I created in VirtualBox by installing from scratch.
(I know that in the video nautilus is displaying 'Rubbish Bin' as its title, but that a separate bug, since I'm clearly working in the home folder, and because this bug happens even if nautilus is displaying 'Home Folder' as its title.)
Here's a screen video showing me trying unsuccessfully to add a bookmark via drag'n'drop and also via the bookmark menu.
Note that in the (other) user account where I already have a bookmarks section and where adding bookmarks works, I get a horizontal black line displayed in the left-hand section when I drag a folder over it. The line moves between other bookmarks as feedback to indicate where the bookmark will be added when I release the button. There is no such line displayed here.
This machine in the video is one that I created in VirtualBox by installing from scratch.
(I know that in the video nautilus is displaying 'Rubbish Bin' as its title, but that a separate bug, since I'm clearly working in the home folder, and because this bug happens even if nautilus is displaying 'Home Folder' as its title.)