I have upgraded the sugar instance from 184.108.40.206 to 220.127.116.11. After that I didn't get login page. I have changed some settings. Now I am getting login page. But I was not able to login into the instance. I am the below error while trying to login into the instance.
"Unable to sync with server. A request is failing that makes the application unusable. Please contact technical support."
What I have to do now?