Learning path module 4.9.3

All, I'm making my way through the Learning Path.  On module 4.9.2 I *think* I have restricted the association correctly (my data view looks like the screen shot at the bottom of 4.9.2).   However, in the next module, it says "Remember to use the TrainingEvent constraint on the Add button!"  I can't see how to do that, and as a result I have an error telling me "An object of type Registration should be passed to the page, but no object is available."  The page that it's linking to has a data view of Registration and also looks like the associated module screen shot, so I cannot see what I am doing wrong. Any ideas, please? Thanks in advance.
1 answers

Attach your button to a microflow and create the object registration and pass that to the page. That should work!