pgadmin4 : postgresql application server could not be contacted.

Question

I have installed PostgreSQL 9.6.2 on my Windows 8.1. But the pgadmin4 is not able to contact the local server. I have tried several solutions suggested here in stackoverflow

Answer 1

If you use older postgresql version like 9.x and its services is running,PgAdmin 4 confused which server is base database.

So stop the service older version or new one.Run PgAdmin 4 as Administrator

Its worked for me