Hi
In order to fix it you will need to be able to edit the functions.php file of the theme. This can be done with an FTP program or file editor if your hosting provider has one.
Look for the line 201 and comment line 201,203 in functions.php and change line 205 like this:
wp_enqueue_script( 'flymag-masonry-init', get_template_directory_uri() . '/js/masonry-init.js', array('jquery', 'masonry'), true );
Now, I do not encourage others to modify this but this is something the theme author should be dealing with and possibly updated in a future release. Generally speaking you would be making any changes with a child theme so you don’t lose changes but because it is a rather trivial thing it’s a small pass. ??
Let us know if that works!
I did this fix based on this thread
https://www.ads-software.com/support/topic/lost-the-masonry-way-to-a-vertical-line