I have a link to a deleted folder in “quick access” (frequent folders). However, I cannot remove it, because when I try to “unpin” it I get an error “Location is not available”.
Somewhat related to “How do I correct Quick Access folder links?“, but with no applicable answer.
Solution:
The answer above was useful, but did not work for me. Clear did simply not clean it up. However, I have found a way to get rid of it.
I have tried to unpin it with the little “pin icon” next to the entry. This did not show any result. However, there is also a “unpin” context menu entry (right mouse). This for some reason did work.