If the trigger action to Send Email is not firing, please check if

1. the email/sms content for missing } or overusing {{{

2. the custom values are valid:

    especially the links: List of valid Custom values

3. the email addresses are valid: e.g. test@gmail,com with a comma as the dot

4. From field is in the format of an email address:

    e.g. Change ABC company to its email like info@abccompany.com

Related article: https://help.gohighlevel.com/support/solutions/articles/48001155002-send-test-email-error-an-error-occurred-please-try-again