Method Not Allowed - The method is not allowed for the requested URL
<p>I'm trying to build a python flask application, but I'm facing an issue when I try to submit form data to the python method.</p>

<p>The issue that the server is throwing is "Method Not Allowed".</p>

<blockquote>
  <p>HTML CODE</p>
</blockquote>

<pre><code>&lt;h1&gt;Submit the Link&lt;/h1&gt;
    &lt;form action="/submit_article" method="POST" name="form"&gt;
        &lt;div class="col-md-4 col-md-offset-4"&gt;
            {{ form.hidden_tag() }}
            &lt;div class="form-group"&gt;
                &lt;label class="control-label" for="description"&gt;Name&lt;/label&gt;
                {{ form.description }}
            &lt;/div&gt;
            &lt;div class="form-group"&gt;
                &lt;label class="control-label" for="link"&gt;Link&lt;/label&gt;
                {{ form.link }}
            &lt;/div&gt;
            &lt;button class="btn btn-default" type="submit"&gt;Submit&lt;/button&gt;
        &lt;/div&gt;
    &lt;/form&gt;
</code></pre>

<blockquote>
  <p>PYTHON METHOD (submit_article)</p>
</blockquote>

<pre><code>@app.route('/submit_article', methods=['POST'])
def submit_article():
  form = UploadForm()
  if request.method == 'POST':
    data = {
        "_id": form.link.data,
        "description": form.description.data,
        "user": current_user.username,
        "time": datetime.datetime.now()
    }

    try:
        if((app.config['NEWS_COLLECTION'].insert(data))):
            flash("Link added successfully", category="success")
            return redirect(request.args.get("new") or url_for("new"))

    except DuplicateKeyError:
        flash("Article link already exists in the Database", category="error")
        return render_template("submit_article.html")

  return render_template('submit_article.html', title='login', form=form)
</code></pre>