Joining error: c3/8b

Please tell me! Why end device and the router is not connected to the coordinator (at all firmwares: 1001, 1003)? Thank you!
In AT mode: atjn0

The response:

Joining PAN: 00158d00005bc92e
Join ERR: c3
Error

Joining PAN: 00158d00005bc92e
Join ERR: 8b
Error

Hello,

Could you please let us know what module you are using so that we can help you.

Thanks and Regards