Limit custom post type to the authors only on front-end!

I’m trying to limit the custom-post-types to their authors excluding administers on the homepage. This is how the code looks like on the homepage.php

  <?php             $  args = array(           'post_type' => 'project',           'post_status' => 'publish'           );            $  post_query = new WP_Query ( $  args ); ?>            <?php while($  post_query->have_posts()):$  post_query->the_post(); ?>       //display post type content            <?php endwhile; ?> <?php wp_reset_postdata(); ?> 

I tried using the code below, that almost achieved what i wanted but it is giving an unusual 404 error instead of the homepage for the new users(authors) but works absolutely fine when logged-in as administrator or from old author’s profile before adding this code.

// limit post display to post authors function limit_post_to_only_author($  query) {     global $  current_user;     if (!current_user_can('manage_options')) {         $  query->set('author', $  current_user->ID);     } } add_action('pre_get_posts', 'limit_post_to_only_author'); 

I’ve posted a question with detailed explanation about the issue that the above code is causing here. but would prefer a solution to limit the post to authors on the frontend…