Steps to Remediate
First, attempt to run the following PowerShell script:
get-wmiobject -class win32_product | ? { $_.Name -like "*lion*" } | % { $_.Uninstall() }
If that still doesn’t allow a successful uninstall or upgrade please continue below
If the above still does not allow for a successful uninstall or upgrade, locate and rename the MSI file downloaded from Admin > Agents
From there rename the file to “LiongardAgent2.0.3.msi” or the current version number
To determine a Liongard Agent's version: