pgadmin 4 fatal error the application server could not be contacted Solved For Detailed Process Watch Video:: Steps to solve the error pgadmin 4 fatal error the application server could not be contacted 1 step :: go to control panal 2 step : click on program and fetures 3 step : click on postgreySQl 4 step::click on uninstall and change 5 step :: choose individual component 6 step :: choose pgadmin and click on next and wait until delete completed 7 step : download pgadmin:: https://www.postgresql.org/ftp/pgadmin/pgadmin4/v5.4/windows/