Content Starting After Sidebar/Space

https://sweetstreetsla.com/?page_id=1134

I’m trying to install a plugin for events — something must be going on in my theme somewhere that causes the page content to start after the sidebar?

#main{
margin: <?php echo $grd_main_column_margins; ?>;

I’m not a CSS pro so I’m not entirely sure how to fix this but it does it the same when I tried a shop script, the products all loaded after a long space.

Could anyway help me out?