Warning: Undefined array key "cart" in /home/collegiality/lectiopublishing.com/checkout.php on line 26
Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /home/collegiality/lectiopublishing.com/checkout.php:27
Stack trace:
#0 {main}
thrown in /home/collegiality/lectiopublishing.com/checkout.php on line 27