Newsletter Error

Hi, I’m attaching a screenshot here. I’m trying to add Maierlite as a newsletter but when I past HTML code in the designated area it never works. https://ibb.co/jMpmyz8
Kindly help me out. I’m frustrated with it.

Thanks.

• This reply was modified 2 years by starship77777.
• This reply was modified 2 years by starship77777.

Thanks, Anamaria 🙂

I have one more query I’m willing to add a button when I lcik it shows newsletter signup.
Newsletter service provider has given me this code

<button class=”ml-onclick-form” onclick=”ml(‘show’, ‘6MfRAZ’, true)”>Click here to show form</button>

and said embedd wherever you want and you will get that feature. I don’t know how to embed it. It is neither HTML nor CSS. I created a button but it asks URL not this code.
so how to enter this code in my website and get access to button feature.

Thanks so much:)