I have a student who is using ArcGIS Online to create a map for an assignment in my class, but is unable to share the map to "Everyone" or to our org. She has saved the map to her My Content area from inside the map viewer and then clicks on the Share button. This is what she sees:

The Share dialog box does not give her an option to choose with whom to share. Any ideas?
Thanks in advance,
Allen Risley
Adjunct Instructor
Department of Liberal Studies
California State University San Marcos