Fatal error: During inheritance of IteratorAggregate: Uncaught ArgumentCountError: Too few arguments to function default_error_handler(), 4 passed in /usr/home/skip850/domains/moodle.wsd.info.pl/public_html/lib/navigationlib.php on line 893 and exactly 5 expected in /usr/home/skip850/domains/moodle.wsd.info.pl/public_html/lib/setuplib.php:421 Stack trace: #0 /usr/home/skip850/domains/moodle.wsd.info.pl/public_html/lib/navigationlib.php(893): default_error_handler(8192, 'Return type of ...', '/usr/home/skip8...', 1138) #1 /usr/home/skip850/domains/moodle.wsd.info.pl/public_html/lib/setup.php(599): require_once('/usr/home/skip8...') #2 /usr/home/skip850/domains/moodle.wsd.info.pl/public_html/config.php(26): require_once('/usr/home/skip8...') #3 /usr/home/skip850/domains/moodle.wsd.info.pl/public_html/calendar/view.php(48): require_once('/usr/home/skip8...') #4 {main} in /usr/home/skip850/domains/moodle.wsd.info.pl/public_html/lib/navigationlib.php on line 893