LoRa Button LB801 error message

I am using LB801 with RAK7243C Pilot Gateway and a external LoRaServer (not the one in RAK7243C). However, I am receiving an error message that I can not identify the cause. The message is attach
image

Can anyone help?

You can try using the built-in LoRaserver to first connect to determine if there is aserver problem.