sigle post not loading

Hello guys,

I’m totally not experienced in coding, but I’m researching a lot and making some progress. I understand very few of php, and my problem may be there, for some mistake that I didn’t notice while doing.

My single posts are not displaying anymore.

The single.php in theme ease folder looks like this
(the theme has been strongly customized, not only by me):

<?php get_header(); ?>
<div id="main">
	<?php get_template_part( 'content', 'single' ); ?>
</div><!-- #main -->
<?php get_sidebar(); ?>
<?php get_footer();

Is there something wrong in it?
Where could the problem be?

I’ve tried disabling all the plugins, it didn’t make a difference.
I’m afraid of changing themes or re-installing wordpress and than having a whole new mess…

the website is bcubico.com

Thanks a lot for any help…!