Fatal error: Declaration of SRF\iCalendar\iCalendarFileExportPrinter::getFileName(SMW\Query\QueryResult $queryResult) must be compatible with SMW\Query\ResultPrinters\FileExportPrinter::getFileName(SMW\Query\QueryResult $queryResult): string|false in /var/www/html/extensions/SemanticResultFormats/src/iCalendar/iCalendarFileExportPrinter.php on line 77