Hi John,
Thanks for your reply.
We will get the Nginx server restarted again.
The thing is that, this issue(upstream sent too big header) only happens when we use Switch To. According to our server team, none of the server configuration has changed in past few months.
Is the a way to test that these additional nginx directives are updated properly on the production server?
It will be great if you can point in the right direction to resolve this.
