Finder will not open a folder even though it has significant content
Have recently upgraded from High Sierra to Monterey. My home folder has 28 folders in it, including Desktop and Documents. Now when I click in the triangle next to the Documents folder in list view, it will not open. Double-clicking the folder will not open it, and clicking on its short-cut icon in the sidebar will not work either. All the other folders work correctly. Even Get info does not appear to work properly. I cannot find any way to get at what is in the folder. Spotlight can still find files in it.
iMac, macOS 10.12