Wordpress Website down after Wordpress Update

I just put all of our sites through the latest wordpress update. All worked fine but for the one that matters. Our Panoptic Website didn't like the update and threw out this error:

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 4248 bytes) in /home/jeffvarnes/public_html/wp-content/plugins/js_composer/js_composer.php on line 841

What do we need to do to fix it?