Error 99 otaa mode - join failed

I’m trying to use RAK7258 + RAK811 + ChirpStack, but in OTAA mode I get error 99 which implies that the join failed, I don’t understand what the problem is, I’ve been trying to find it for hours. I made tests by the RAK7258 built-in server and everything works fine, the problem is when I forward to chirpStack. I can see the uplink JoinRequest but the downlink JoinAccepted never happens, please help me.

Please check the device data tab. It might contain an error event :slight_smile: