Fatal error: During inheritance of IteratorAggregate: Uncaught ArgumentCountError: Too few arguments to function default_error_handler(), 4 passed in /home/clients/ebf98fc29912e169429fe47cc753b15d/web/lib/navigationlib.php on line 897 and exactly 5 expected in /home/clients/ebf98fc29912e169429fe47cc753b15d/web/lib/setuplib.php:421 Stack trace: #0 /home/clients/ebf98fc29912e169429fe47cc753b15d/web/lib/navigationlib.php(897): default_error_handler(8192, 'Return type of ...', '/home/clients/e...', 1142) #1 /home/clients/ebf98fc29912e169429fe47cc753b15d/web/lib/setup.php(599): require_once('/home/clients/e...') #2 /home/clients/ebf98fc29912e169429fe47cc753b15d/web/config.php(27): require_once('/home/clients/e...') #3 /home/clients/ebf98fc29912e169429fe47cc753b15d/web/course/index.php(26): require_once('/home/clients/e...') #4 {main} in /home/clients/ebf98fc29912e169429fe47cc753b15d/web/lib/navigationlib.php on line 897