Edit the pmsi.installer.updater.manager.exe.config located in the \ppart\updater folder and add the following:
<PMSI.Installer.Updater.Manager.Properties.Settings>
<setting name="AmazonBucket" serializeAs="String">
<value>11.2</value>
</setting>
<setting name="UpdateListFile" serializeAs="String">
<value>P:\ppart\Updater\ProductUpdates.ppupdate</value>
</setting>
<setting name="UpdateDestPath" serializeAs="String">
<value>P:\ppart\Updater\Updates\</value>
</setting>
<setting name="LicenseDestDir" serializeAs="String">
<value>P:\ppart\</value>
</setting>
<setting name="ClientBasedProducts" serializeAs="Xml">
Make sure that the Amazon bucket entry is there. There are at least 2 sections that are labeled "<PMSI.Installer.Updater.Manager.Properties.Settings>" and it should be located in the first section. Look for the other entries below the Amazon bucket to determine if you are in the correct section.