Unable to log into WordPress Admin Dashboard automatically from Plesk because of absolute URL

Symptoms

• An attempt to log into WordPress Dashboard from Plesk via Domains > example.com > WordPress > Log in fails with the error 404.
• It can be opened via direct URL in the browser: https://example.com/wp-login.php
• When WP Dash board is open from Plesk the Browser URL shows incorrect link, for example: https://example.com/https://example.com/wp-login.php
• Domains > example.com > Wordpress > Setup (next to login) shows the absolute path to wp-login.php: https://example.com/wp-login.php:

Cause

The Login URL is not configured correctly, the relative path should be used instead of absolute one.

Resolution

1. Log into Plesk;
2.  Modify the Login URL to wp-config.php from Domains > example.com > Wordpress > Setup (next to login) as follows:
   
3. Save the changes.