Monitor Solution RMS Agent upgrade errors with code 1612
A corrupted install of the current version of the plug-in caused this issue.
First, try to uninstall the Plug-in using the uninstall policy found under Settings > Agents/Plug-ins > Monitoring and Alerting > Monitor > Windows > Rollout. Select the uninstall for either x86 or x64 as applicable.
If that fails, run through the following steps: