Hooray! I figured out the problem.
I was missing a couple WordPress core files. When I added the single.php file everything started working again. I had to comment out a few lines, which you will see below. But if you cannot locate this single.php file just copy the code I pasted and try adding single.php to your wp-content/(active theme) folder.
<?php
/**
* @package WordPress
* @subpackage Default_Theme
*/
get_header();
?>
<div id="content" class="widecolumn" role="main">
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<div class="navigation">
<div class="alignleft"><?php previous_post_link( '%link', '« %title' ) ?></div>
<div class="alignright"><?php next_post_link( '%link', '%title »' ) ?></div>
</div>
<div <?php post_class(); ?> id="post-<?php the_ID(); ?>">
<h2><?php the_title(); ?></h2>
<div class="entry">
<?php the_content('<p class="serif">' . __('Read the rest of this entry »', 'kubrick') . '</p>'); ?>
<?php wp_link_pages(array('before' => '<p><strong>' . __('Pages:', 'kubrick') . '</strong> ', 'after' => '</p>', 'next_or_number' => 'number')); ?>
<?php the_tags( '<p>' . __('Tags:', 'kubrick') . ' ', ', ', '</p>'); ?>
<p class="postmetadata alt">
<small>
<?php /* This is commented, because it requires a little adjusting sometimes.
You'll need to download this plugin, and follow the instructions:
https://binarybonsai.com/wordpress/time-since/ */
/* $entry_datetime = abs(strtotime($post->post_date) - (60*120)); $time_since = sprintf(__('%s ago', 'kubrick'), time_since($entry_datetime)); */ ?>
<?php /* printf(__('This entry was posted on %1$s at %2$s and is filed under %3$s.', 'kubrick'), get_the_time(__('l, F jS, Y', 'kubrick')), get_the_time(), get_the_category_list(', ')); */ ?>
<?php /* printf(__("You can follow any responses to this entry through the <a href='%s'>RSS 2.0</a> feed.", "kubrick"), get_post_comments_feed_link()); */?>
<?php if ( comments_open() && pings_open() ) {
// Both Comments and Pings are open ?>
<?php /* printf(__('You can <a href="#respond">leave a response</a>, or <a href="%s" rel="trackback">trackback</a> from your own site.', 'kubrick'), get_trackback_url()); */?>
<?php } elseif ( !comments_open() && pings_open() ) {
// Only Pings are Open ?>
<?php printf(__('Responses are currently closed, but you can <a href="%s" rel="trackback">trackback</a> from your own site.', 'kubrick'), get_trackback_url()); ?>
<?php } elseif ( comments_open() && !pings_open() ) {
// Comments are open, Pings are not ?>
<?php _e('You can skip to the end and leave a response. Pinging is currently not allowed.', 'kubrick'); ?>
<?php } elseif ( !comments_open() && !pings_open() ) {
// Neither Comments, nor Pings are open ?>
<?php _e('Both comments and pings are currently closed.', 'kubrick'); ?>
<?php }/* edit_post_link(__('Edit this entry', 'kubrick'),'','.');*/ ?>
</small>
</p>
</div>
</div>
<?php comments_template(); ?>
<?php endwhile; else: ?>
<p><?php _e('Sorry, no posts matched your criteria.', 'kubrick'); ?></p>
<?php endif; ?>
</div>
<?php get_footer(); ?>
