Warning: Undefined array key 0 in C:\xampp\htdocs\LL-Dominus\tests\ia\tools\validate_target_references_offline.php on line 111

Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, null given in C:\xampp\htdocs\LL-Dominus\tests\ia\tools\validate_target_references_offline.php:111 Stack trace: #0 C:\xampp\htdocs\LL-Dominus\tests\ia\tools\validate_target_references_offline.php(111): array_keys() #1 {main} thrown in C:\xampp\htdocs\LL-Dominus\tests\ia\tools\validate_target_references_offline.php on line 111