Can't execute pgAdmin4

Question

I installed Postgres9.6 ver And pgAdmin4 was installed together. But It is return message "The application server could not be contacted" When i execute pgadmin.

I tried to download and install pgAdmin4 from web. But have not changed anything.

I couldn't get anything Although I searched google about the message.

I Set System Path, And Postgres is running in my local. But pgadmin don't start up.

Do somebody know about this? Thank you.

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update:

i found this question.

I think that is same my problem which got 3 good vote even if the message is different a little.

So i'm trying do that, But can't run setup.py.

I installed python. and run pgAdmin\web\setup.py with cmd as admin. But fail with message of

from flask import Flask No module named 'flask'

thank you.

Answer 1

I had the same problem with pgAdmin 4 1.5 on Windows 10 Professional. The solution was simply to delete %appdata%\pgAdmin which was created by an earlier version. On systems other than Windows, there probably is a pgAdmin directory in your user directory. Of course, all session settings etc. are gone after deleting this.

Answer 2

We got the same issue. so no need to any change in the file.

The following step we have resolve.

1. Search programs and files in start menu in cmd.
2. Right click cmd icon with Run As Administrator to open window command prompt.
3. Goto postgres directory C:\Program Files\PostgreSQL\10\pgAdmin 4\bin using cd command in command prompt or set environment variable
4. Execute pgAdmin4 command.

Let us know if you have problem again.