Most web browsers block mixed active content. To fix this type of error, all requests to HTTP content should be removed and replaced with content served over HTTPS.
Your EmailMeForm form won’t be displayed on your HTTPS website due to the aforementioned mixed content error if the SSL feature of the form is disabled. Therefore, we recommend account admins to enable the SSL feature of the form before embedding/integrating the form into a website.
To add SSL to your forms, for secure data transmission, you may:
Log in to your account on emailmeform.com, then hover your mouse over to the form you wish to add SSL encryption to, then click on "Options". From there, you will see the option for enabling SSL encryption. It will be turned off by default.
Click the toggle to turn it on. Once it turns on, you will see it listed as: