Fatal error: During inheritance of IteratorAggregate: Uncaught ArgumentCountError: Too few arguments to function default_error_handler(), 4 passed in /usr/home/abmis/domains/e4te.2ap.pl/public_html/lib/navigationlib.php on line 897 and exactly 5 expected in /usr/home/abmis/domains/e4te.2ap.pl/public_html/lib/setuplib.php:421 Stack trace: #0 /usr/home/abmis/domains/e4te.2ap.pl/public_html/lib/navigationlib.php(897): default_error_handler(8192, 'Return type of ...', '/usr/home/abmis...', 1142) #1 /usr/home/abmis/domains/e4te.2ap.pl/public_html/lib/setup.php(599): require_once('/usr/home/abmis...') #2 /usr/home/abmis/domains/e4te.2ap.pl/public_html/config.php(27): require_once('/usr/home/abmis...') #3 /usr/home/abmis/domains/e4te.2ap.pl/public_html/course/view.php(5): require_once('/usr/home/abmis...') #4 {main} in /usr/home/abmis/domains/e4te.2ap.pl/public_html/lib/navigationlib.php on line 897