Prevented from opening visual studio because of inability to write to folder WPF

Copied from VSO ID: 1068111
A few days ago I was attempting to build/deploy a web site to a subfolder of C:\inetpub\wwwroot. After using Internet Information Services (IIS) Manager to create the folder, I tried using Visual Studio (2019) to build the web site. My 1st attempt failed, and I was instructed - I believe by a Visual Studio diagnostic - that I would have to run Visual Studio in Administrative mode. I tried again after restarting Visual Studio in Administrative Mode, and the Build was successful. But, from then on I was unable to reopen Visual Studio without Administrative Mode: the diagnostic was displayed in an ordinary popup box with an OK button, and with the text “Cannot write to folder C:\user\sncole\AppData\Local\Temp\WPF. Access is denied”.
(It is possible that I caused this error when I tried to reopen Visual Studio before closing it while it was in Administrative Mode.)
I used Google Search extensively to try to find some other user with a similar experience; no luck. Finally - a day later - I stumbled on a work-around. I tried to open C:\user\sncole\AppData\Local\Temp\WPF with Windows Explorer; Windows Explorer similarly informed me that access was denied, but it asked me whether I wanted to override the access denial. I said “yes”, and I was allowed to view the contents of C:\user\sncole\AppData\Local\Temp\WPF. Since then I no longer need Administrative mode to open Visual Studio.

The issue here is that a WPF folder is getting created in the temp directly with wrong ACLs.