when using a string parameter in the Project name field, the CopyArtifact plugin fails to find the project. The logfile shows that the name was properly resolved, but it still reported unable to find project.

Config setting of Project name field: Nuance_config_folder_${branch}

log snippet:

Unable to find project for artifact copy: Nuance_config_folder_Main
This may be due to incorrect project name or permission settings; see help for project name in job configuration.
Build step 'Copy artifacts from another project' marked build as failure"