Unable to get Ipads into Single App mode

[blk7]

I am trying to test out Single App Mode so we can fulfill a request a user has when their new Ipad comes in. They want it to only allow access to Safari and not allow any websites except the sign in page they set up. I have been able to restrict other sites with no issues, but the Single App mode is causing me issues. I created a Configuration Policy and selected Safari from the Lock to App drop down. When I scope it to my test group, it does attempt to apply, but fails due to "The field “Identifier” contains an invalid value.". Even when I chose "Specify Build ID" and enter "com.apple.mobilesafari" as the build ID, I get the same error. This happens for all apps in the drop down.

I have confirmed the Ipad is supervised and all other settings I set up have applied with no issues. It is just this one thing that will not apply. 

Any assistance anyone can provide would be appreciated. 

[mschlosser]

I had to do a similar configuration for the bookstore on one of the campus that I support; I was able to get things to work through a combination of configuration profiles; I'll try to summarize them for you here:

Restrictions: Apps->Autonomous Single App Mode apps-> Safari->Bundle ID: com.apple.mobilesafari

Single App Mode->Lock To App->Safari

That's one profile I called BookstoreSafariLock

Another profile as follows

Content Filter-->Built-in: Specific Websites Only--->Add all websites the devices need to access.Called BookstoreURLFilter in my case

Also added some web clips for easy access to certain URLs and added a profile to put the devices on the preferred wifi.

This setup works for us. Hope that helps.