application not opening - Mailing list pgadmin-support

I just downloaded pgAdmin 4, installed it, and attempted to open it. It does not open and when I attempt a second time it tells me that it can't open it because the application is not responding. I downloaded the Mac OS version of the application and I'm running macOS Catalina 10.15.3 on a mid 2012 mac. Any idea how I might resolve the issue?

Thanks for your help.