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SignalR integration with EpiServer CMS



I am trying to integrate SignalR with EpiServer CMS Solution but it is failing to create connection with Hub.

everytime i try it gives me this error at console log...

" Error during negotiation request."

Tried clear the .NET temporary files but no success


Rajesh K

Oct 30, 2018 16:40

what's happening on the server? when you enable more loggging? we are running this combination without any issues

Oct 31, 2018 9:11

It gives me below error (from browser Developer Tools, Network Tab Details):

  1. Request URL:
  2. Request Method:
  3. Status Code:
    400 Bad Request
  4. Remote Address:
  5. Referrer Policy:

Response: Protocol error: Unknown transport.

Oct 31, 2018 15:34

it doesn't loook right. transport is missing. what client library are you using to connect to hub?

below initial request in our case (note transport mode):


Edited, Nov 01, 2018 8:22

The fix has been applied.

It was URL Rewrite rules (in web config) which was the problem.

Dec 27, 2018 12:41
This topic was created over six months ago and has been resolved. If you have a similar question, please create a new topic and refer to this one.
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