Smart Energy joining fails with AI = 36

I have two XBee Pro S28 chips. One is setup as the coordinator with firmware version 3130. The other is setup as a router with firmware version 3330. I’ve successfully loaded test certificates on both chips and the Verify Certificate (VC) value is showing 1 for verified. I have the same link key setup on both chips and EO = 8 on the router.

I’ve read through the forums and the manual repeatedly and believe I have everything setup correctly, but I am unable to get the router to join the network. The router keeps indicating an AI value of 36 “received terminate request”.

Can someone explain what this error code really means? Am I missing something in my setup?

Thanks in advance for any help provided.