I face some barriers during migration 2.1 to 3.1. I get "no such host error" but once this run in 2.1, it can work without any error message been showed.
So far I didn't change any source related to this feature. I have checked all the request URLs I send to the server and the request header is the same as the 2.1 version.
Does anyone experience on this, and please share your experience and how you solve the issues
What is the root cause and how to migration 2.1 to 3.1
