Warning: Undefined variable $currentList in C:\WebServer\htdocs\bookshelf\storage\framework\views\56b268a3828e205993dd6fa9f2f8394f.php on line 6

Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in C:\WebServer\htdocs\bookshelf\storage\framework\views\56b268a3828e205993dd6fa9f2f8394f.php:6 Stack trace: #0 C:\WebServer\htdocs\bookshelf\storage\framework\views\56b268a3828e205993dd6fa9f2f8394f.php(6): array_merge(NULL, Array) #1 {main} thrown in C:\WebServer\htdocs\bookshelf\storage\framework\views\56b268a3828e205993dd6fa9f2f8394f.php on line 6