How to fix forbidden error in ubuntu18.04 LTS apt-get update?

Question

Err:1 http://archive.ubuntu.com/ubuntu bionic InRelease
  403  Forbidden [IP: 91.189.88.174 80]
Err:2 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
  403  Forbidden [IP: 91.189.88.174 80]
Err:3 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
  403  Forbidden [IP: 91.189.88.174 80]
Err:4 http://archive.ubuntu.com/ubuntu bionic-security InRelease
  403  Forbidden [IP: 91.189.88.174 80]
Reading package lists... Done