Device data not received

I am trying to connect a device to the chirpstack server, the issue is that the device is unable to send data to the Server, when the Device is added a join request packet is received on the server and can be seen in the Device’s Lora frame but then nothing, however device’s data is shown under Gateway’s Lora frames section on regular intervals. I need help in debugging this issue
Gateway Used: MKGW2-LW
Device Used: LW002-TH
Frequency: EU868