So I like the way this works now, but think the style of this should match normal validation errors. To do that, you need to add the `error` class to the parent `.control-group` div (line 104) using JS and have the following markup structure in place of this `p` tag:

                <span id="phone_number_paste_error" class="help-inline" style="display: none;">
                    <strong>
                        {% trans "Phone numbers can only contain digits and we were unable to convert yours automatically." %}
                    </strong>
                </span>

Note: I updated the message in there as well.