2.0 upgrade via foreman-installer fails with timeout of foreman-discovery plugin

Problem: I’m upgrading from 1.24 to 2.3, via 2.0 and my upgrade has failed via the foreman-installer with the error:

image-latest.tar]: Could not evaluate: Could not retrieve file metadata for
: execution expired

This error was persistent in upgrades 1.21, 1.22, 1.23 and 1.24. However, foreman-installer continued to launch Foreman UI. However, in this 2.0 upgrade, this error stops foreman-installer serving the application.

The host the Foreman sits on does not have internet access. I tried configuring the puppet.conf file to include the http_proxy_host and http_proxy_port config options to point to our proxy so Foreman might be able to reach the outside, but I did not have any luck. I also manually downloaded the fdi-image-latest.tar file and placed it in the correct directory, but foreman-installer continues to try to download the file itself.

Expected outcome: Ignore the error and continue to launch Foreman or use the file in the directory /var/lib/tftpboot/boot/fdi-image-latest.tar and continue with the installation

Foreman and Proxy versions: 2.0

Foreman and Proxy plugin versions: 2.0

Distribution and version: Ubuntu 18.04

Other relevant data: