Opera won't import bookmarks from any browser. Attempted to import from both Chrome and Edge with no result.

Opera>More Tools>Import bookmarks and settings>(browser select from dropdown)>All boxes checked concerning Favorites/Bookmarks>Import. Busy wheel pops up, "Your selected data and settings were successfully imported!"

Check bookmarks, there's nothing there.

Tried doing it while both signed in and signed out. Still nothing.

Opera 48.0.2652.0
Windows 10 64-Bit