Wrong content is shown for WordPress website after cloning: all images were replaced with one picture

Symptoms

• The WordPress instance example.com was cloned to subdomain.example.com via Plesk WordPress Toolkit extension.
• All images on the subdomain.example.com website were replaced with one picture.
• In the WordPress Admin Dashboard of subdomain.example.com domain, some pictures were replaced with the same image.

Cause

The .htaccessfile for subdomain.example.com domain, contains redirect rules to original website example.com. 

Resolution

1. Log into Plesk.
2. Go to Domains > subdomain.example.com > File Manager.
3. Open the .htaccess file.
4. Comment the lines with the redirect rules to example.com website:
   For example, from:
   

   CONFIG_TEXT: RewriteCond %{HTTP_HOST} ^.example.com\.com/wp-content/uploads/2014/05/example\.png [NC]
   RewriteRule ^(.*)$ http://example.com/wp-content/uploads/2014/10/example.png [L,R=301] 

   To

   CONFIG_TEXT: #RewriteCond %{HTTP_HOST} ^.example.com\.com/wp-content/uploads/2014/05/example\.png [NC]
   #RewriteRule ^(.*)$ http://example.com/wp-content/uploads/2014/10/example.png [L,R=301] 

5. Save the changes.