I Installed Sitecore 9 XP1 with Separate CD and CM servers.

I am getting the below error in CD:

Unexpected character encountered while parsing value: <. Path '', line 0, position 0
31260 12:55:45 ERROR Cannot start analytics Tracker
Exception: Newtonsoft.Json.JsonReaderException
Message: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.
Source: Sitecore.Xdb.Common.Web