Can you please post a screenshot of the pop-up dialog (see The specified item was not found.)?
Are you using IE/Edge browser or a different browser? If different, which one?
I have windows 10 which was not listed on the how to post a screenshot. I am using internet explorer for my browser.
The instructions for Windows 10 is the same as Vista, 7, and 8 - use the Snipping Tool to take the screenshot. You can use Windows 10 Search field to search for Snipping Tool.
I've updated OS versions in the FAQ