"Error 1904 module C:\Program Files\Common Files\Aelita Shared\Migration Tools\Processing Wizards\QsProjectCom.dll failed to register" is encountered when attempting to install the Sharepoint Processing Wizard.
Additionally: the event viewer shows the following errors:
Event Type: Error
Event Source: SideBySide
Event Category: None
Event ID: 59
Generate Activation Context failed for C:\Program Files\Common Files\Aelita Shared\Migration Tools\Processing Wizards\QsProjectCom.dll. Reference error message: The referenced assembly is not installed on your system.
Even with requirements met, the error appears while installing the Migration Manager | Sharepoint Processing Wizard. The problem relates to the installation of .Net Framework on the particular server.
Install the Microsoft Visual C++ 2005 Redistributable Package from this Microsoft article to repair / replace a missing or corrupt file required for .NET proper functionality. Once installed (no reboot required), perform a reinstall of the Sharepoint Processing Wizard.