Restart your training from the beginning and your issue will be solved.
a dataview requires an object of type, it is probably available in your grid or microflow from where you are calling the page object.
Hi,
So if I'm correct you have a go to page button which goes to ‘TrainingEvent_Overview’?
If that page contains a dataview as a page parameter the page expects that object. Overview pages mostly don't contain a dataview if I'm correct, mostly a datagrid or list view. So maybe you have a wrong setup for the ‘TrainingEvent_Overview’ page.
Can you maybe share a screenshot of the page so we can help you a bit more.
According to the rapid developer learning path, there is one rule when it comes to pages with a data view: they need an object of the same entity that is connected to the data view to work.
Cheers,
Sonia