When I change the permalink settings from default to post name my site stops working.
I can change the permalink and save the changes, WP say's the change has been updated/saved.
But then whenever I click a link from the homepage of my site, I get an Internal Server Error.
Changing the permalinks back to default makes the site work again.
I can't find access to the .htaccess file as other posts mention.
How do I fix this problem?