It seems that after migrating our Server instance to Data Center, our issue collectors are failing:
Today, some clients have notified us that they are experiencing issues with the issue collectors in their projects. The error "Oops Something went wrong" appears when someone tries to make a request from the web source through the issue collector.
I verify with those users that the HTML is the same in the Jira issue collector and in the web source but we still giving this error in the page code: "POST https://jira.havas.com/pm/rest/collectors/1.0/template/custom/e534a674 404 (Not Found)"
Our version is