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
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.