The problem exists here...The place where you have to write form action="add"
you have written it as action="submit"
<form action = "/add" methods="POST">
<div class = " form-group">
<h3>Jeopardy Question</h3>
<input
type = "text"
name = "Question"
placeholder= "Type the Jeopardy question here"
/>
</div>
<div class = " form-group">
<h3>Jeopardy Answer</h3>
<input
type = "text"
name = "Answer"
placeholder= "Type the Jeopardy Answer here"
/>
</div>
</form>