'Next Slide' Button when importing engage interaction to Storyline

I've had no issues importing the engage interaction.  However, I am having problems with linking the engage interaction with the next slide in the storyline.

I had it set so that the 'Next Slide' button appears once learner has viewed all the content.  I have also turned off the previous and next buttons.  However, the 'Next Slide' button just doesn't work. 

Any tips for me on how I can get it to work?

Thank you!

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