On the forge page for the component the screen shot and the notes say that the component is using c# .NET Driver 2.11.4. However if you open the demo app 2.4.2 is hardcoded into the homepage. Similarly if you look in the MongoDBLibX.csproj file the references are all to API 2.4.2. Did an incorrent version get loaded up to the forge during teh update in May?
I've started publishing an updated version of this component so that we can deliver the clients apps. This uses latest API version, latest .Net Framework and updated dnsclient. By default supports the latest MongoDB and uses latest Guid formats.
I've kept where possible the same server action names to make it easier for anyone updating.
https://www.outsystems.com/forge/Component_Overview.aspx?ProjectId=12234