solving issues The following signatures were invalid: EXPKEYSIG ABF5BD827BD9BF62

 how to solve this :

The following signatures were invalid: EXPKEYSIG ABF5BD827BD9BF62 nginx signing key <signing-key@nginx.com>

1. vi /etc/apt/sources.list.d/nginx.list

Bold is a key used to check, it must be updated

deb [signed-by=/usr/share/keyrings/nginx-archive-keyring.gpg] http://nginx.org/packages/ubuntu/ focal nginx
# deb-src http://nginx.org/packages/ubuntu/ focal nginx

Update key:

curl -s https://nginx.org/keys/nginx_signing.key | gpg --dearmor > /usr/share/keyrings/nginx-keyring.gpg