Error 8 when activating with SOLO Server.
Posted by Dan H, Last modified by Tanner O on 04 June 2018 10:42 AM

Error code 8 means the application received a response from the activation attempt that could not be understood.  Generally, this may be an issue related to a proxy server, firewall, or another content filtering system intercepting the communication. To see if it is a possible proxy server issue, here are some common troubleshooting steps:

  • Start by having the user navigate to SOLO Server using Internet Explorer (Windows 8.1 or earlier) or Edge (Windows 10 or later), which can provide some insight into whether or not the browser prompts the user to authenticate first. You can start by making sure the user has all browser tabs and windows closed, opening a fresh browser window, and then navigating to the appropriate address:
  • If the user can reach SOLO Server, they should simply see the text "OK" in the web browser. If the user cannot reach SOLO Server using a web browser, this could be a general connectivity issue, or it could be a policy issue.
  • If the user can reach other popular websites (such as,, but cannot reach SOLO Server, then it is possible that policy is blocking access to SOLO Server. Have the user contact their IT department. SOLO Server uses standard ports: 443 for HTTPS and 80 for HTTP.

These steps are found in the following article which contains a more in-depth discussion about proxy servers and general troubleshooting steps as well to help narrow down the issue.