I should note that in the download there are three examples file including Xojo Web, Xojo Desktop, and FileMaker and there's an issue with Xojo Desktop 64 bit HTMLViewer. Xojo Web 64 bit works fine.
When using Xojo Desktop, the Pivot Chart doesn't appear when running as 64 bit, but works for 32 bit. I saw there are several Feedback cases related to issues with the HTMLViewer, but I'm not sure which one applies to this issue. If you run as 32 bit and then as 64 bit it works. If you close the project and then immediately run as 64 bit it will not work.