![pgAdmin - Windows - The application server could not be contacted - проблема - Вопрос - Ответ - Sys-Admin Forum pgAdmin - Windows - The application server could not be contacted - проблема - Вопрос - Ответ - Sys-Admin Forum](https://forum.sys-adm.in/uploads/default/original/2X/c/c312dc9fcfcc18ca6587fc41b22bde86b3b241a6.png)
pgAdmin - Windows - The application server could not be contacted - проблема - Вопрос - Ответ - Sys-Admin Forum
![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'
![Unable To Add Existing DDC(s) To SQL AlwaysOn Setup - Error: The Replica Server Could Not Be Contacted Unable To Add Existing DDC(s) To SQL AlwaysOn Setup - Error: The Replica Server Could Not Be Contacted](https://support.citrix.com/files/public/support/article/CTX217247/images/0EM60000000DKk4.png)
Unable To Add Existing DDC(s) To SQL AlwaysOn Setup - Error: The Replica Server Could Not Be Contacted
![Error: "This computer could not contact the certificate's revocation server so cannot be used as it may have been revoked" Error: "This computer could not contact the certificate's revocation server so cannot be used as it may have been revoked"](https://support.citrix.com/files/public/support/article/CTX135780/images/0EM60000000POwy.jpeg)
Error: "This computer could not contact the certificate's revocation server so cannot be used as it may have been revoked"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)