Error loading colour scheme Package and Error parsing plist

This error occurs when modifying the theme, but package control is not installed.

1. Enter in the console

import urllib.request,os; pf = 'Package Control.sublime-package'; ipp = sublime.installed_packages_path(); urllib.request.install_opener( urllib.request.build_opener( urllib.request.ProxyHandler()) ); open(os.path.join(ipp, pf), 'wb').write(urllib.request.urlopen( 'http://sublime.wbond.net/' + pf.replace(' ','%20')).read())

Install the package manager 
2. Press "CTRL + SHIFT + P" to open the package manager, enter Package Control: install Packages, press Enter, install. 
3. After installation, you will find a lot of theme themes