Getting errors in setup of Helium Gateway

I have tried to setup a helium gateway server by using this tutorial Hands-on with RAKStars Episode 37 with Johan Macias - YouTube

I followed each step carefully and after using the command “sudo tail -f /var/log/syslog | grep ttn-gateway”, I’m getting there errors.

If anyone can help me out, I shall be very thankful.

Regards.