Adding button to project Widget

So I am having an issue adding a new item to my project widget. When I go to add something to the widget it wants me to create a whole new project, when I just want to add to this category. How do I do this? I go to widgets and see where to add but can’t get it to work. Here is what I see

Hey there,

I hope you are well today and thank you for your question.

If you wish to add a button, you can add the HTML widget and add the following code.

<a href="#" title="Button" class="latest-news-button button">Name Here</a>

Best regards,