N: Skipping acquire of configured file 'nginx/binary-i386/Packages' as repository 'http://nginx.org/packages/ubuntu bionic InRelease'

petulia3478

Full Error:
N: Skipping acquire of configured file 'nginx/binary-i386/Packages' as repository 'http://nginx.org/packages/ubuntu bionic InRelease' doesn't support architecture 'i386'

Received while running:

$ apt-get update

The solution was:

Edit /etc/apt/sources.list.d/nginx.list

Change: 
deb http://nginx.org/packages/ubuntu/ bionic nginx
deb-src http://nginx.org/packages/ubuntu/ bionic nginx

To:
deb [arch=amd64] http://nginx.org/packages/ubuntu/ bionic nginx
deb-src http://nginx.org/packages/ubuntu/ bionic nginx

Doing another apt-get update after this change it worked fine.