RAK7243 Cannot Connect to TTN

Hey, new here…

I have completed this guide from Rakwireless several times, but I cannot get my registered device connected on the TTN.

Link to guide:

My steps:

  • Communicate with device using wifi and PuTTy.
  • Connecting the Rak device through client mode (connecting it to wifi).
  • Register on the TTN, using the given EUI id.

Anybody have any troubleshooting tips or any experience with this device?