Well, now I feel stupid for thinking the "Ask A Question" box was for the actual question and not header. For the question above:
I'm generating a MMPK for Explorer for ArcGIS (iOS) using ArcGIS Pro 2.4.1. When the file is imported into Explorer it shows as an "Invalid map" and generates a "Unable to Open Map: Mobile map package version is not supported." when I attempt to open it. Is there an update pending for Explorer for ArcGIS to accept these newer MMPKs or is this a misleading error indicative of a different issue?
Matt,
Yes, we are working on updates to Explorer that will support map expiration.
Definitely would like to know more about your map, with regard to missing layers, layer visibility and zoom extents.
If you are using group layers in your source map, that could explain part of the problems you are seeing. Group layers are not supported in the current release... something that will be fixed in the next.
Mark