All applications with a cloudways domain, i.e. phpstack-xxxxxxx-xxxxxxx.cloudwaysapps.com are receiving the following error when served with HTTPS:

"Safari can’t open the page because the server unexpectedly dropped the connection. This sometimes occurs when the server is busy. Wait for a few minutes and then try again."

The fix is to add an htaccess rule to the web root folder:
"Header unset Upgrade"

This does work, however it seems like there is a Cloudways HTTPS configuration error that could be addressed.

Thanks!