Fatal error: During inheritance of IteratorAggregate: Uncaught ArgumentCountError: Too few arguments to function default_error_handler(), 4 passed in /home/users/kds/public_html/mampum.lo4.edu.pl/platforma/lib/navigationlib.php on line 893 and exactly 5 expected in /home/users/kds/public_html/mampum.lo4.edu.pl/platforma/lib/setuplib.php:421 Stack trace: #0 /home/users/kds/public_html/mampum.lo4.edu.pl/platforma/lib/navigationlib.php(893): default_error_handler(8192, 'Return type of ...', '/home/users/kds...', 1138) #1 /home/users/kds/public_html/mampum.lo4.edu.pl/platforma/lib/setup.php(599): require_once('/home/users/kds...') #2 /home/users/kds/public_html/mampum.lo4.edu.pl/platforma/config.php(27): require_once('/home/users/kds...') #3 /home/users/kds/public_html/mampum.lo4.edu.pl/platforma/index.php(30): require_once('/home/users/kds...') #4 {main} in /home/users/kds/public_html/mampum.lo4.edu.pl/platforma/lib/navigationlib.php on line 893