Vendor autoload is not found. Please run 'composer install' under application root directory.
It asked me to install composer and when i attempted to do so,
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.
Problem 1 - The requested PHP extension ext-intl * is missing from your system. Install or enable PHP's intl extension.
Problem 2 - The requested PHP extension ext-xsl * is missing from your system. Install or enable PHP's xsl extension.