If you're getting Not Found error on your Website Front-end or Back-end, like the image below. This guide will help you to fix this issue by yourself!
First, you need to login to your Plesk panel. And follow the steps below.
Once you've logged into your control panel, Choose Apache & Nginx Settings under the domain, that you're getting errors.
Now, you need to configure some default Server settings to fix this issue. By default, Index files option is set to Default, you need to change it to Custom Value and enter the line below on the text field.
index.php index.cgi index.pl index.html index.xhtml index.htm index.shtml
Or Just enter index.php only.
Now, scroll down to the next section. Here, we need to disable the Proxy mode. Once you've disabled the Proxy mode, don't forget to save changes by Clicking on OK or Apply.
And that's it! Now, you can check your site and it'll work now! If you're still getting this error, please feel free to contact us and we'll fix this issue for you!
Also, whenever you Install Wordpress on your domain, we suggest you to update your Permalinks Settings from your WordPress Admin Panel. It maybe configured with yourdomain.com/index.php/post-name/
So, this may cause some errors on your site. So, we suggest you to update Permalinks Settings of your WP site.