An official hotfix is available to manually upgrade version 4.1.1148 of the SDA only. This hotfix is not needed for the RSA.
The hotfix can be downloaded from the link at the bottom of this article.
To apply the hotfix, navigate to Settings | Appliance Maintenance, under the Manual Updates section, browse for the downloaded KBIN file, then click Update Server. This will not reboot the SDA, but may take a few minutes for the appliance to become fully responsive and refresh the pages.
Note: If the update page fails to load properly and you receive a page with the message: "This site can't be reached" you can remove ":52231/upgrade" from the URL to access the SDA again.
Verification of the completed update can be seen under Settings | Appliance Logs | Privileged Action Server | Output Log.
Once the upgrade is complete, all RSAs must be synchronized so that they receive the updated file.
This will resolve the issue and Windows Post Installations will run normally.