Trying to setup PMM Orchestrator

I have followed all the steps to configure orchestrator and created user in all my managed instances. Also I have started the orchestrator with docker in PMM server. But when I am trying to login to the console via http://mypmmserver/orchestrator it is giving below 502 bad gateway error. Although my Grafana dashboard for qan,graph and related things are working fine. Please suggest. 502 Bad Gateway [HR][/HR]nginx