I had ArcGIS Enterprise (Server, Portal, Datastore, etc.) previously installed version 8.1. I completely uninstalled, removing all registry, stale folders, etc. I did a full install of ArcGIS Enterprise 11.1 (Server, Portal, Datastore, etc.) I'm using Experience Builder that is built into Portal and not the developer version. Even restarting the hosting server, clearing cache and all data on the users end will not allow the users to view it however if going directly to the webmap or a WAB app with the same data users can view it without issue.