![pgadmin 4 fatal error the application server could not be contacted | Error Solved | postgresql - YouTube pgadmin 4 fatal error the application server could not be contacted | Error Solved | postgresql - YouTube](https://i.ytimg.com/vi/RdawuOyi_ak/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLC7UVANSiX47aHUDw5uC6r2blfzzg)
pgadmin 4 fatal error the application server could not be contacted | Error Solved | postgresql - YouTube
![Solved] Get fatal error: server could not be contacted when running pgAdmin4. 'NoneType' object has no attribute 'value' Solved] Get fatal error: server could not be contacted when running pgAdmin4. 'NoneType' object has no attribute 'value'](https://exerror.com/wp-content/uploads/2021/05/image-1-1024x259.png)
Solved] Get fatal error: server could not be contacted when running pgAdmin4. 'NoneType' object has no attribute 'value'
![Error: "This computer could not contact the certificate's revocation server so cannot be used as it may have been revoked" Error: "This computer could not contact the certificate's revocation server so cannot be used as it may have been revoked"](https://support.citrix.com/files/public/support/article/CTX135780/images/0EM60000000POwy.jpeg)
Error: "This computer could not contact the certificate's revocation server so cannot be used as it may have been revoked"
![PostgreSQL: "The application server could not be contacted" error during start as App-V application. PostgreSQL: "The application server could not be contacted" error during start as App-V application.](https://www.postgresql.org/message-id/attachment/59350/____ATT89433%201.jpg)
PostgreSQL: "The application server could not be contacted" error during start as App-V application.
![ibinti on Twitter: "#pgadmin Why the pgAdmin 4 app v 2.0 and 2.1 refused to start? https://t.co/aKXARwldil" / Twitter ibinti on Twitter: "#pgadmin Why the pgAdmin 4 app v 2.0 and 2.1 refused to start? https://t.co/aKXARwldil" / Twitter](https://pbs.twimg.com/media/DTsll_yVoAALv5Y.png)