Could not update snippet. Request failed with status code 500

I have the Pro version.

Everything working fine except for 1 snippet that it will not let me edit or save. This is a snippet I’ve used for a long time. It will import, activate, and deactivate just fine. In fact it works …. until you want to edit it.

I need to edit it and when saving or deactivating it gives the “Could not update snippet. Request failed with status code 500”.

add_action('wp_head', function(){
    ?>
    <link rel="shortcut icon" href="//cdn.completecpr.com/favicon.ico" type="image/x-icon" />
    <meta name="description" content="BLS, ACLS, PALS. American Heart Association CPR Classes for Healthcare Providors as well as for the general public. Blended and eLearning options as well as tradition classes. Skills Checkoffs too." />
    <?php
},1);