load library from index.html

index.html

     <script src="https://api.callstats.io/static/callstats.min.js"></script>
     <script src="config.js?v=15"></script><!-- adapt to your needs, i.e. set hosts and bosh path -->
     <script src="interface_config.js?v=6"></script>
-    <script src="libs/lib-jitsi-meet.js?v=139"></script>
+    <script src="lib-jitsi-meet.js?v=139"></script>
     <script src="libs/app.bundle.min.js?v=139"></script>
     <script src="analytics.js?v=1"></script><!-- google analytics plugin -->
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