Websockets and xhr fails in epi UI?

Jon Börjesson
Member since: 2010

I have an editor that gets these errors in IE console when logging in to EPi:

I guess its a generic websockets/xhr issue and not an epi issue, but i thought thay maybe someone else here has seen this before and knows what's causing it?

#162845 Oct 18, 2016 8:20
  • Johan Kronberg
    Member since: 2005

    Can you paste some full error responses?

    I'm seeing status 416 in the screenshot. Never seen that...

    #163189 Oct 19, 2016 22:08
  • Joni Hietala
    Member since: 2016

    If you are using Windows 7, then there isn't native Web Socket support available. You have to use Windows 8 or 10. From Episerver System Requirements for development: "Note: From CMS 9, Windows Server 2008/2008 R2 and Windows 7 are no longer supported."

    #163471 Oct 21, 2016 8:18
  • Jon Börjesson
    Member since: 2010

    Thanks for answers!

    It seems to something with the corporate firewall or such. It works from an other connection.

    #163472 Oct 21, 2016 8:28
  • David McDonald
    Member since: 2008

    We are having a similar problem.  Is there a direct link betweeen the 416 error and the web sockets problem? Is fixing the web sockets through the firewall the only solution?

    #196863 Sep 13, 2018 16:19
  • David McDonald
    Member since: 2008

    Never mind.  The 416 errors DID turn out to be firewall issues.  The custmer found it was an outgoing firewall issue that had to do with content/malware scanning. Didn’t show anything in the event log but somehow affected the traffic. 

    #196873 Sep 13, 2018 20:29