Fatal error: Uncaught Error: Interface "SMW\Indicator\IndicatorProvider" not found in /var/www/html/extensions/SemanticMediaWiki/src/Indicator/IndicatorProviders/DeferrableIndicatorProvider.php:17 Stack trace: #0 {main} thrown in /var/www/html/extensions/SemanticMediaWiki/src/Indicator/IndicatorProviders/DeferrableIndicatorProvider.php on line 17