Add /app/themes/coop-tech-oowp-theme/public/js/vendor.js

And use relative URL in script tag so it is served locally.

about.html

@@ -10,7 +10,7 @@
     <link rel='dns-prefetch' href='//s.w.org' />
 <link rel='stylesheet' id='oowp_css-css'  href='/app/mu-plugins/oowp/oowp.css?ver=4.8' type='text/css' media='all' />
 <link rel='stylesheet' id='app-css'  href='/app/themes/coop-tech-oowp-theme/public/css/app.css?ver=4.8' type='text/css' media='all' />
-<script type='text/javascript' src='https://www.coops.tech/app/themes/coop-tech-oowp-theme/public/js/vendor.js?ver=4.8'></script>
+<script type='text/javascript' src='/app/themes/coop-tech-oowp-theme/public/js/vendor.js?ver=4.8'></script>
 <link rel='https://api.w.org/' href='https://www.coops.tech/wp-json/' />
 <link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://www.coops.tech/wp/xmlrpc.php?rsd" />
 <link rel="wlwmanifest" type="application/wlwmanifest+xml" href="https://www.coops.tech/wp/wp-includes/wlwmanifest.xml" />