A published express map that I recently made has seemingly disappeared from my Arc story map collection. I am not sure how this could've happened as I had access to it just a couple of days ago from the following link: https://storymaps.arcgis.com/stories/6c3852d6d1f945f889e479556b0af50e\
@GabeAbatecola -- I'm not sure I can explain what happened from the information provided. Please contact Esri Technical Support and they can look into this for you.