When you asked if it looked ok, I missed the fact that you don’t have action: in front of each of your actions 
notify:
- platform: group
name: My group
services:
- action: mobile_app_adam_s_phone
- action: mobile_app_stacy_s_phone
ok so progress, notify.my_group shows under actions now… I get that error in the trace from the blueprint
This is going to sound dumb, but reset your browser cache and then try to trigger the automation again.

success, I did not have the underscore between my and group. Super picky on the way spaces are used from the gui and yaml code!!!
One more question, If want to add other groups can i stay under notify and group then add the name syntax and create another group?
You might want to post a comment on the blueprint’s thread suggesting the author add a filter to insure the input returns a slug.