Activation server determined specific product key has been blocked?

Computer Type: PC/Desktop
System Manufacturer/Model Number: Pi Foundation Raspberry Pi 4B
OS: Windows 10 IoT
CPU: Broadcom BCM2711B0 quad-core A72 (ARMv8-A) 64-bit @ 1.5GHz
Motherboard: Raspberry Pi Model 4B
Memory: 4GB LPDDR4 SDRAM
Graphics Card: Broadcom VideoCore VI
Sound Card: Combined 3.5mm audio jack and composite video
Monitor(s) Displays: 7 Inch Pi Foundation Touch Screen
Screen Resolution: Two 4K displays at up to 4Kp30 or a single display at up to 4Kp60
Keyboard: Mini Wireless with touchpad
Mouse: FT5406 10 point capacitive touchscreen
PSU: USB C 5.1V @ 3A
Case: Pibow Coupe Ninja
Cooling: Heat Sink and Fan Shim.
Hard Drives: 16 GB SanDisk Ultra Class 1 Micro SD card.
Internet Speed: Gigabit Ethernet + 2.4GHz and 5GHz IEEE 802.11.b/g/n/ac
Browser: Edge
Antivirus: non
Other Info: Dual Micro HDMI 2 USB 2 ports and 2 USB 3 ports 40 GPIO pins Bluetooth 5.0, Bluetooth Low Energy (BLE) Camera interface (CSI) Display interface (DSI) Micro SD card slot