Poor pressure first use this season, what is going on?

Rachio 2, successfully in use since last summer. I didn’t run my sprinkler system during winter months due to water averaging, live near San Antonio, TX. No freeze problems here. Why is my pressure near non-existent? I keep running through the zones hoping that will blow the air out. But no success? Any advice? Or is it time to call a pro? I did have some plumbing work in the house last month, turning meter pressure off and on. Could that have changed something?

Check your backflow valve and make sure it is in the open position.