Can’t get it to work

I’ve looked through every support topic and tried to edit this every which way. I still can’t get this Co-authors plugin to work properly. Soledad theme.

Thanks for the help!

This is what I have at the moment:

<?php if ( ! get_theme_mod( 'coauthors_posts_links' ) || ! get_theme_mod( 'penci_single_meta_author' ) || ! get_theme_mod( 'penci_single_meta_date' ) || ! get_theme_mod( 'penci_single_meta_comment' ) ) : ?>
			<div class="post-box-meta-single">
				<?php if ( ! get_theme_mod( 'coauthors_posts_links' ) ) : ?>
					<span class="author-post"><span><?php esc_html_e( 'written by ', 'soledad' ); ?><a>"><?php the_author(); ?></a></span></span>
				<?php else:	penci_single_meta_author(); ?>	
				<?php endif; ?>
				<?php if ( ! get_theme_mod( 'penci_single_meta_date' ) ) : ?>
					<span><?php the_time( get_option('date_format') ); ?></span>
				<?php endif; ?>
			</div>
		<?php endif; ?>

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