Attempted to upgrade version 6.1.10 but encountered an error while downloading the packages. The specific error is as follows:

Failed to download one of the following packages: ('128T-manifest-0:6.1.10.8.lts.el7-1.x86_64', '128T-deprecated-packages-0:6.1.10.8.lts.el7-1.x86_64', 'shim-x64', 'grub2-efi-x64')

Workaround -

Download the ISO then import ISO

Use the curl command to authenticate to and download the ISO from 128T's public repo.

curl -O -L -u <user>:<token> https://software.128technology.com/artifactory/list/generic-128t-isos-release-local/6.1/128T-6.1.10-8.lts.el7.OTP.v1.x86_64.iso

Once downloaded, use the import iso command to make it known by 128T (what it does is takes the packages that are bundled in the iso and unpacks them into the local repo so that the installer can recognize them).

import iso filepath /tmp/128T-6.1.10-8.lts.el7.OTP.v1.x86_64.iso

Now proceed with the upgrade.