Hello.
After upgrading MW to 1.26 when I want to go to MediaWiki:Vector.css I grt error:
Fatal error: Class 'Symfony\Component\Process\ProcessBuilder' not found in /home/budrysl2/domains/westeros.com.pl/public_html/extensions/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.class.php on line 286
Could anybody help me with that?