Thanks for report
Which antivirus?
Which ad is blocked?can you give me ads url?
It is the Avast software, last update 210408-4. Here's the dialog box I get when I use the "File Upload" page.
It does it on all addresses starting with s***.highstream.tv (upload page) or highstream.tv (only on the dashboard). I don't have more information. Is it possible that this' a false positive?