“L'URL demandée n'a pas été trouvée sur le serveur. ballon” Réponses codées

L'URL demandée n'a pas été trouvée sur le serveur. ballon

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>