Hello Josh,
Thanks for asking. 
Can you please share the file for us to test on our end? You can upload the file on online file sharing services like Dropbox and share the link. In the mean time please try increasing memory limit. You can do this by editing your wp-config.php file which can be located under the root of your WordPress installation. Upon increasing the memory please try again and see how it goes.
Add the following lines into that file.
define( 'WP_MEMORY_LIMIT', '512M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );
You can add it before the line
/*That's all, stop editing! Happy Blogging. */
Thanks.