The following problems were found:

• You cannot add "Drone with 1080P Camera - Foldable Remote Control Quadcopter with Voice Gesture Control, 3D Flip, One Key Start, Emergency Stop, 2 Batteries, Easier to Use, Toy for Kids Adults Beginners, Grey" to the cart because the product is out of stock.
• You cannot add "WH-CH720N Noise Canceling Wireless Headphones Bluetooth over the Ear Headset with Microphone and Alexa Built-In, Black New" to the cart because the product is out of stock.
• You cannot add "Gaming PC Desktop, Geforce RTX 3060 Ti 8G, AMD Ryzen 7 5700X up to 4.6G, 32G DDR4, 1T SSD, 600M Wifi, BT 5.0, RGB Fan X 4, Windows 11 Home" to the cart because the product is out of stock.