Fatal error: Uncaught UnexpectedValueException: callback 'MediaWiki\Extension\VisualEditor\Hooks::onRegistration' is not callable in /data/TRAUMKULT/Lexikon-Traumkultur/includes/registration/ExtensionRegistry.php:556
Stack trace:
#0 /data/TRAUMKULT/Lexikon-Traumkultur/includes/registration/ExtensionRegistry.php(317): ExtensionRegistry->exportExtractedData(Array)
#1 /data/TRAUMKULT/Lexikon-Traumkultur/includes/Setup.php(285): ExtensionRegistry->loadFromQueue()
#2 /data/TRAUMKULT/Lexikon-Traumkultur/includes/WebStart.php(92): require_once('/data/TRAUMKULT...')
#3 /data/TRAUMKULT/Lexikon-Traumkultur/index.php(44): require('/data/TRAUMKULT...')
#4 {main}
thrown in /data/TRAUMKULT/Lexikon-Traumkultur/includes/registration/ExtensionRegistry.php on line 556