Why would FA be blocked on my remote server but not my local server?
Access to CSS stylesheet at ‘https://use.fontawesome.com/releases/v5.14.0/css/all.css’ from origin ‘https://vacations.koparadmin.com’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.
login:10
GET https://use.fontawesome.com/releases/v5.14.0/css/all.css net::ERR_FAILED 200
Sounds like they switched webservers or something and forgot to include the CORS header. E-mail them? 
No opinions on why it worked on localhost
Edit: Huh, aren't you supposed to get a custom code from them?
https://cdn.fontawesome.com/
"Get a unique embed code with Font Awesome that's made just for you."
I would use another CDN to be honest
Yeah, it does provide you with a unique key. No idea why it worked on local but not remote. Anyways, I solved it by uninstalling the FA 5 frameworks and adding the FA5 Pro frameworks and it’s all good.