Troubleshooting 1 zone - digging?

Hello, I have a new Rachio 3 and 1 of my 9 zones stopped working. There has been landscape digging. How do I go about trying to find out where the problem is (I am only assuming that is the issue based on reading other posts) and then fixing it? Thanks!

The easiest way is usually with a multimeter if you have one. Below is a video that might help. Was the digging near wires, box, pipes, or ???