Widget sem o Header, já ajustado no arquivo JS dele

functions.php

<?php
// CORS support to Wordpress RSS
add_action( 'pre_get_posts', 'add_header_origin' );
function add_header_origin() {
    if (is_feed()){
        header( 'Access-Control-Allow-Origin: *' );
    }
}

widget_spacemoney.html

<section id="spacenow-feed" class="">
  <div style="padding-bottom: 30px;">
    <div class="tradingview-widget-container">
      <div class="tradingview-widget-container__widget"></div>
      <script type="text/javascript" src="https://s3.tradingview.com/external-embedding/embed-widget-ticker-tape.js" async>{"customer":"","symbols":[{"description":"IBOVESPA","proName":"BMFBOVESPA:IBOV"},{"description":"Dólar","proName":"FX_IDC:USDBRL"},{"description":"EURO","proName":"FX_IDC:EURBRL"},{"description":"BBAS3","proName":"BMFBOVESPA:BBAS3"},{"description":"SANB4","proName":"BMFBOVESPA:SANB4"},{"description":"PETR4","proName":"BMFBOVESPA:PETR4"},{"description":"VALE3","proName":"BMFBOVESPA:VALE3"},{"description":"BBDC4","proName":"BMFBOVESPA:BBDC4"},{"description":"ITUB4","proName":"BMFBOVESPA:ITUB4"}],"colorTheme":"dark","isTransparent":false,"largeChartUrl":"http://www.spacemoney.com.br/cotacoes","displayMode":"compact","locale":"br"}</script>
      <br>
      <p style="text-align: right;margin: 0;"><a href="https://br.tradingview.com/" target="_blank" rel="noopener noreferrer"><span style="font-family: tahoma, arial, helvetica, sans-serif; font-size: 8pt; color: #fff;margin-right: 10px;">Cotações por TradingView</span></a></p>
      <span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span>
    </div>
  </div>
</section>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script src="https://spacemoney.com.br/wp-content/plugins/wp_pluginRSS_keys/spacenow-feed-rss.min.js"></script>