Hi, how can I solve this? It is visible when I enter the plugin

Fatal error: Uncaught ArgumentCountError: Too few arguments to function rlMultiField::getLevel(), 1 passed in /mnt/webs/e0/12/54477112/htdocs//plugins/multiField/admin/multi_formats.inc.php on line 445 and exactly 2 expected in /mnt/webs/e0/12/54477112/htdocs//plugins/multiField/rlMultiField.class.php:1267 Stack trace: #0 /mnt/webs/e0/12/54477112/htdocs//plugins/multiField/admin/multi_formats.inc.php(445): rlMultiField->getLevel(NULL) #1 /mnt/webs/e0/12/54477112/htdocs//administrator7/index.php(211): require_once('/mnt/webs/e0/12...') #2 {main} thrown in /mnt/webs/e0/12/54477112/htdocs//plugins/multiField/rlMultiField.class.php on line 1267