Are you trying to use ArcGIS basemaps? I'm unclear what is being attempted with Tableau. In addition, we have a few folks in the forums that are very familiar with Mapbox and might be resources if that is a route you find interesting. We just need a bit more detail about what is being attempted so we can point you in the right direction or find a helping hand.
We aren't looking to do anything too fancy, but we want to be able to add some points of interest on a better looking base map than what Tableau offers. I have tested Mapbox already, and once you figure out how to create your map getting it into Tableau is super easy. I have created arcGIS maps, but because we all have Macs instead of PCs I can't download the desktop software to export a map.