Are there still any support present for Kali Nethunter in 2019?

[Vegito Rocker]

Hey there I asking for support because I just installed Kali Nethunter but I want to is there any support present for this app because I can't update packages it returns with an error 😣 "Unable to fetch some archives, maybe run apt-get update or try with --fix-missing"

When I try to update it always shows failed to fetch

Can you please let me know if you know the solution anyone?
Thanks in advance

[Nooblearner]

What is the error?
Does it say anything about pub_keys?