Proxy Problem with vps server

I'm having trouble establishing communication in a secure HTTPS manner between the Rest API on my VPS server and the website. When I direct the requests to my server using the "exsample.site.com" domain address via an A record in DNS Records with the "proxied" feature enabled, I receive a "request timed out" response. When the proxy is turned off, I encounter a "connection is not secure" issue.