Right after installing my SSL-RSA key in FMS (18.104.22.168) and restarting the Windows server 2016 Standard, I get this error when trying to access Web Direct from the internet (https://mpo.fisciences.com/fmi/webd/).
502 - Web server received an invalid response while acting as a gateway or proxy server.
There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.
Restarting FMS service didn't fix it. This server was up and running perfectly since one week, and has been restarted before the SSL-RSA installation without any issue.
One thing I found strangely, it's the Country and Locality showed in FMS config (I used CA and Quebec in my CSR file):