Problem to access pgAdmin

Any advice, to following issue, when accessing PostgreSQL pgAdmin?
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HuaMin ChenProblem resolverAsked:
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Radhakrishnan RSenior Technical LeadCommented:

What's the issue you are getting while accessing postgres?. You are unable to login to postgres? or you don't have the correct credentials?. Or any schema missing after logging in?

Could you post a screen shot for better understanding of the issue?
HuaMin ChenProblem resolverAuthor Commented:
Please see this error
Radhakrishnan RSenior Technical LeadCommented:

When did the issue started? is this broken after any postgres upgrades?. If you are into Pgadmin4, have you tried with older versions? i.e - pgadmin3?

Do you have %appdata%\pgAdmin, if so, delete this entry and see if it works?
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HuaMin ChenProblem resolverAuthor Commented:
I am using the latest version of Postgres. Should I create relevant DB user before doing any configuration, in the server?
Radhakrishnan RSenior Technical LeadCommented:
Yes, you will need to create the user name and password during the installation. You can check this by doing this step

Open Pgadmin3/4>>Expand "Servers">>Right click on "PostgreSQL Database Server (localhost:<port number>)>>Properties>>in the 'username' section, you can find the actual user name.

Also, if you don't have password for that user then you can set 'no password' by editing the config file (pg_hba.conf).

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HuaMin ChenProblem resolverAuthor Commented:
It is newly set up in Win 2012 server. I have the superuser account already. Should I first create the database below?
Radhakrishnan RSenior Technical LeadCommented:

So, you installed Pgadmin4 but currently running version 3, i suspect this could be the issue. Did you checked %appdata%\pgAdmin as suggested earlier?

Yes, you need to create database in order to login into that.
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