Fatal error: During inheritance of IteratorAggregate: Uncaught ArgumentCountError: Too few arguments to function default_error_handler(), 4 passed in /home/clients/82561850bcfe52ea0ffb79f3b13dc718/sites/ssir.swiss/moodle/lib/navigationlib.php on line 897 and exactly 5 expected in /home/clients/82561850bcfe52ea0ffb79f3b13dc718/sites/ssir.swiss/moodle/lib/setuplib.php:425 Stack trace: #0 /home/clients/82561850bcfe52ea0ffb79f3b13dc718/sites/ssir.swiss/moodle/lib/navigationlib.php(897): default_error_handler(8192, 'Return type of ...', '/home/clients/8...', 1142) #1 /home/clients/82561850bcfe52ea0ffb79f3b13dc718/sites/ssir.swiss/moodle/lib/setup.php(604): require_once('/home/clients/8...') #2 /home/clients/82561850bcfe52ea0ffb79f3b13dc718/sites/ssir.swiss/moodle/config.php(27): require_once('/home/clients/8...') #3 /home/clients/82561850bcfe52ea0ffb79f3b13dc718/sites/ssir.swiss/moodle/course/index.php(26): require_once('/home/clients/8...') #4 {main} in /home/clients/82561850bcfe52ea0ffb79f3b13dc718/sites/ssir.swiss/moodle/lib/navigationlib.php on line 897