Fatal error: Uncaught Error: Interface 'SMW\MediaWiki\HookListener' not found in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/SkinTemplateNavigation.php:18 Stack trace: #0 {main} thrown in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/SkinTemplateNavigation.php on line 18