Linked Knowledge Doc:
When selecting the "Documentation" option to install Client Tools, the installer will not complete and fail due to this option being selected. A workaround would be to uncheck the documentation option or to follow the below steps:
1. Install client tools
2. Select the Documentation
3. It should ask for the Language zip. Before selecting the language zip edit the file C:\Program Files\CA\Identity Governance\Client Tools\Software\assembly-Docs.txt and remove DNA in 19th line. That means, change the following from:
4. Then proceed to select the zip file in installer.
5. The installer should complete now.