First off this thread title is very misleading.

A number of issues with this first time posters complaints:

1) Not every airport in the US system offers electronic boarding passes. So most likely it was not a glitch in the app. The poster could have easily printed a boarding pass from the website.

2) Even though it was a small airport, 40 minutes is pushing it. Thats assuming the 40 minutes is an accurate reflection of the timing involved.

3) TSA is not responsible for summoning airline employees for passengers that need assistance.

4) OP in essence missed the flight. Reservations would not be able to rebook without charging a fee.

5) Airline wasn't at fault for the OP cutting it close and not being adequately prepared as such (i.e. printed boarding pass). Why should they have offered transportation to the alternate airport or any compensation for that matter?