When user ran a manual scan and navigated to a specific URL, the following error occurred:
「Error: Unable to parse Web Server response: Failed to complete read operation」
While accessing the URL via any Browsers or Truclient Browser, it was working well.

To troubleshoot the issue, you can use the following steps to analyze the root cause.

1. Run it through the WebInspect Web Proxy tool and a regular, working browser (Chrome, Firefox, etc.) to see if that is the cause of the situation.
    In this case, we can observe that the same issue occurred in Web Proxy tool and the Response show nothing in traffic data when requesting against the URL.
2. Access the URL via chrome browser and get .har file to capture the web session traffic data.
3. Try Adjusting the below settings in SPI.Net.Proxy.config file ( location is C:\Program Files\Fortify\Fortify WebInspect.) to avoid the network connection error.
For example:

<ServerReadTimeout>600</ServerReadTimeout>
<WebSocketInactivityTimeout>20</WebSocketInactivityTimeout>
<ClientRequestTimeout>600</ClientRequestTimeout>