Go to Next Page Button Error when Preview and Attempt to Publish

I have created a simple action that allows the user to go to the next page

Button

On Click

Goto Next Page

In debug mode it works "action fired"

In run mode it works

In preview in browser mode, I get a file not found?

*** I also tried Lesson, Section or Page and same result...

When I attempt to publish is get this weird message:

"checking pages - Action Goto Previous Page has an unresolved destination"

However - I don't have a "previous page" action anywhere in the simple one chapter demo... this has to be the problem but I have no idea where it's coming from...

Any help appreciated