Fatal error: Uncaught Error: Cannot assign an empty string to a string offset in /var/www/html/w/includes/Settings/Config/ConfigSchemaAggregator.php:377 Stack trace: #0 /var/www/html/w/includes/Settings/Config/ConfigSchemaAggregator.php(377): MediaWiki\Settings\Config\ConfigSchemaAggregator::getStrategyForType() #1 /var/www/html/w/includes/Settings/Config/ConfigSchemaAggregator.php(353): MediaWiki\Settings\Config\ConfigSchemaAggregator->initMergeStrategies() #2 /var/www/html/w/includes/Settings/SettingsBuilder.php(599): MediaWiki\Settings\Config\ConfigSchemaAggregator->getMergeStrategies() #3 /var/www/html/w/includes/Settings/SettingsBuilder.php(440): MediaWiki\Settings\SettingsBuilder->applySettings() #4 /var/www/html/w/includes/Setup.php(201): MediaWiki\Settings\SettingsBuilder->apply() #5 /var/www/html/w/includes/WebStart.php(86): require_once('...') #6 /var/www/html/w/index.php(50): require('...') #7 {main} thrown in /var/www/html/w/includes/Settings/Config/ConfigSchemaAggregator.php on line 377