Settings not Saved

Hi Support Team

I followed your Instructions to integrate a 3rd party email into WooCommerce Email Template Customizer:
https://villatheme.com/knowledge-base/compatibility-scenarios-with-3rd-party-email-plugins/

I’ve added the php-snippet with the mail IDs to register my 2 custom mails which worked but now when i make a new Mail inside your plugin and select my custom mails as “mail type” i can not save it this way. The mail type reverts to “select email type” everytime i try to save it.

Can you please look into this?

kind regards
Chris