Permalink Error

Sounds like you are on a windows server and/or php is misconfigured. This article could maybe help https://dejanjanosevic.info/remove-index-php-permalink-in-wordpress/.

in permalinks option it shows https://mysite/index.php in every setting like

https://mysite/index.php/2020/08/28/sample-post/

Who to remove this index.php

I’m using godaddy’s plesk | i am using shared hosting for three sites
Problem occurs only in main site that is uder httpdocs directory.

what i’ve tried sofar

1. every post in this forum that is related to removing index.php
2. i am unable to find .htaccess file (tried filezilla with force show hidden file and and other file browsers.
3. added the .htaccess file manally (as described in some forums)
4. edited web.config file
5. changed permission settings.

But every thing is not working please guide