That page is expecting a File object as a parameter, but you are not passing one when using the Open Page action.
Some solutions could be
Looking at the error, it seems that the page has a dataview which expects object of type File.
If the page needs to be opened from the navigation, either create an object or retrieve based on application logic as required and pass this to a show page activity in microflow.
Hope this helps!
EDIT – See Robert’s answer, you could also achieve this via datasource microflow.