can't delete web data in Safari Privacy preferences
In the Privacy tab of Safari Preferences, I've tried clicking on Manage Website Data to clear that out. When I click on Remove All, there is a little spinning wheel that appears to be doing something, then the whole list of web sites reappears. None of them have been deleted. I can highlight them one by one and then click on Remove, but sometimes that removes them and other times it doesn't. How can I clear out all this stored data? Thanks.
iMac, macOS High Sierra (10.13.3), Retina 4K, 21.5-inch, Late 2015
