Http 10016 Vyascentral Portable !!hot!! -

The "Authentication rejected" aspect of Error 10016 can be triggered by Windows Defender or 3rd party antivirus blocking the portable app's attempt to open a local HTTP port.

Is your "portable" setup a or a browser-based extension? http 10016 vyascentral portable

The server sees a desktop user agent string and bypasses the portable device checks. The "Authentication rejected" aspect of Error 10016 can