Strange Commenting Issue 3.1.2 (500 Error after comment submit)

<section id="comments">
          <h6 class="section-title">3 Comments</h6>
          Comments are optional and I am editable! Whoop!
          <ol class="comments-list">
{exp:comment:entries sort="desc" orderby="date" limit="20" dynamic="no"}
            <li class="comment">
              <article> {if avatar} {avatar_url} {/if} 
                <div class="comment-meta">
                  <h5 class="author">By: {name} On: {comment_date format="%Y %m %d"} <a href="#" class="comment-reply-link">Reply</a></h5>
                </div>
                <!-- end .comment-meta -->

                <div class="comment-body">
                  {comment}
                </div>
                <!-- end .comment-body --> 
              </article>         
            </li>
{/exp:comment:entries}
          </ol>
        </section>
        <section id="respond">
        <div class="row">
          <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12 blogleft contact">
{exp:comment:form channel="article_wistia_video"} 
              <h3 class="contactTitle">Leave a Comment</h3>
              <div class="row">
                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12 form-group form-row">
                  <input type="text" class="normal" id="name" placeholder="Name" name="name" value="{name}">
                </div>
              </div>
              <div class="row">
                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12 form-group form-row">
                  <input type="email" class="normal" id="email" placeholder="Email Address" name="email" value="{email}">
                </div>
              </div>
              <div class="row">
                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12 form-group form-row">
                  <textarea name="comment" placeholder="Comment" rows="4" class="normal">{comment}</textarea>
                </div>
              </div>
              <!--<div class="row">
                <label><input type="checkbox" name="save_info" value="yes" {save_info} /> Remember my personal information</label>

                <label><input type="checkbox" name="notify_me" value="yes" {notify_me} /> Notify me of follow-up comments?</label>

        {if captcha}
                <label for="captcha">Please enter the word you see in the image below:</label>

                {captcha}

                <input type="text" name="captcha" value="{captcha_word}" maxlength="20" /></p>
        {/if}
              </div> -->             
              <div class="row">
                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12">
                  <input type="submit" id="submit" name="sumbit" value="Submit" class="button">
                </div>
              </div>
{/exp:comment:form}
          </div>
          </section>
          </article>
        </div>
      </div>