User Snychronization 502 Bad Gateway

Hello my friends,

I've installed User Synchronization on a multisite.

I added one subsite.

In the main site I activated the plugin and told it to be the master site.

In the subsite I activated the plugin and told it to be the subsite. I entered the URL of Master site and the Security Key, from the main site.

When I click the "Connect" button the page sits and spins and eventually returns a 502 Bad Gateway error.

I couldn't find an answer here searching for User Snychronization 502 Bad Gateway.

But on Google a 502 bad gateway search gives me...

https://www.google.com/search?q=502+Bad+Gateway&rlz=1C1JRYI_enUA527UA527&aq=f&oq=502+Bad+Gateway&aqs=chrome.0.57&sourceid=chrome&ie=UTF-8

...and, "The 502 Bad Gateway error means that two different servers involved in loading a web page (or other task) are not able to communicate properly."

Any hints will be super! :slight_smile:

Thank you,

Chris