EMAILS QUIT SENDING

I have been testing out the free version of email customizer. It has been working okay until today.

It will no longer send out any emails. I have to deactivate the plugin, then the standard woocommerce emails will send. When I re activate, no emails send.

Do you have any idea why this may be?

Please advise asap.

Thank you.

PS: This site is at a temporary URL. Plan is to move it to it’s permanent URL sometime next week so I need to have this resolved.