PostgreSQL: Cannot launch pgAdmin4
www.postgresql.org › message-id › CAPF6Oct 01, 2016 · well. When I try to launch pgAdmin4 I get the following message: *"Failed to connect to the pgAdmin application server. Click here to try. again."*. I didn't find any log or something which could give me more details about. the connection problem. Windows 10 is installed on my box and I don't have any firewall.