It took me a while, but I finally figured out we needed to make the following modification of web.config in order to get the module to work:
<configuration>
<runtime>
<assemblyBinding>
<dependentAssembly>
<assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"
culture="neutral" />
<bindingRedirect oldVersion="1.0.61025.0" newVersion="3.5.0.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>
We kept getting a blank page when visiting the module settings. Then when looking in the Event, it appeared a control was being used requiring AJAX 3.5. With our site running DNN 4.9.5, we were utilizing AJAX 1.0.