Greetings @ozanfoodtruck
Thank you for reaching us.
This is an issue related to the hosting. Are you running WordPress on a Windows-based server? Are you using the Plesk Control Pane?
My suggestion would be to discuss this with your hosting provider. You may also try checking with the following first.
Firstly, make sure that mod_rewrite is enabled on your server.
Secondly, navigate to Settings > Permalink and make sure that “index.php” is not written in your custom structure.
Lastly, make sure this line of code is in your .htaccess file(if using unix based server):
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
I hope that helps.
Regards,