Deploying a compute node fails with: Error: 'utf-8' codec can't encode characters in position 2623-2624: surrogates not allowed _try_preserve_efi_assets

Issue

When enabling debug log, in ironic, the /var/log/containers/ironic/journal records the following exception:

DEBUG ironic_python_agent.extensions.image [-] Exception encountered while attempting to setup the EFI loader from a root filesystem. Error: 'utf-8' codec can't encode characters in position 2623-2624: surrogates not allowed _try_preserve_efi_assets /usr/lib/python3.6/site-packages/ironic_python_agent/extensions/image.py:755