I have a question about the missing php extension intl.
How would i go about fixing this through FTP server (file zilla)?
I looked at previous posts about this but I could not find how to do it via ftp using a windows 10 x64
It is impossible to install (or enable) a PHP extension using the FTP file manager only.
You should use SSH console or a web hosting control panel like cPanel or Plesk if you have one.