Installation Problem

hello, i have the same error without gpg error message on vps debian 9.9 at https://www.leaseweb.com

cat /etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 83.149.80.123
nameserver 85.17.96.69

I don’t know what to do