Postgresql can't connect application server through PGAdmin4
<p>I installed PostgreSql on my Windows machine.
I can connect to PostgreSql through cmd.
But when I want to launch pgAdmin I am getting this error message.</p>

<blockquote>
  <p>Failed to connect to the pgAdmin application server. Click here to try again.</p>
</blockquote>

<p>I have also Mysql installed on my machine if it can make any complications. </p>