I am get following error from entity reference. "An illegal choice has been detected. Please contact the site administrator."
Following is my step:
1. Create song content type such as the name "Tracker" and set the content type is group content --> this is very important.
2. Add a file field to song content type.
3. Set Groups audience field is FIELD TYPE:Entity Reference and WIDGET:OG reference --> this is very important
4. Use entity reference prepopulate module to get the "Groups audience" values by automatically.
5. Add a field such as "Album" and FIELD TYPE:Entity Reference and WIDGET:Select list.
6. Set "Album" field ENTITY SELECTION from the view. --> In attachment for screenshot
7. After we create the Tracker, the "Groups audience" get the values automatically.
8. Upload the song in the file field
9. select "Album" (This is album name from entity reference view)
10. After you click save, we get the error.
I can stable to reproduced this issue.
My module information:
1. Entity reference 7.x-1.x-dev
2. OG Group 7.x.-2.2
3. Entity reference 7.x-1.3