UPDATE:
By the way, I found a better solution of how to have post excerpts show up on tag pages, archives, category, etc.
Open child content.php and find <?php if ( is_search() ) : ?>
it should be around line 47. Replace with:
<?php if ( is_search() || is_home() || is_category() || is_archive() || is_tag()) : ?>
Then add this to your child functions.php file:
function new_excerpt_more($more) {
global $post;
return ' <a class="moretag" href="'. get_permalink($post->ID) . '">[Continue reading]</a>';
}
add_filter('excerpt_more', 'new_excerpt_more');
Then add this to your child style.css:
.moretag {
ADD YOUR STYLES !important; // this will style the [Continue reading] link the way you wish
}
Reference: https://johngirdwood.com/blog/2013/12/14/how-to-display-excerpt-on-blog-page-wordpress-twenty-fourteen-theme/