Uber app

I downloaded the Uber app to my cell phone. I can't access the app. I get a "connection" message. I purchased this cell phone at an xfinity service center in 2018. I wonder if I need a new phone to use this app. I can access my Uber account on my PC. When I searched for this problem, I found that many other users had the same problem, but it was not clear that all of them, if any, involved xfinity mobile.