RAKPiOS won't boot on rak2287 RPi 3 and 5

Issue:RAkPiOS won’t boot on RPi 3 and 5, need help

Setup:rak2287 PCI-e

Server:

Hello, this is my first time using a concentrator rak2287 with Raspberry 3 and 5. I flashed the current firmware with Balena on a brand new uSD card, but it will not boot on any Raspberry 3 or 5. I would like to use Raspberry 5. Please help me!!!