It means you have to edit the index.html in the Theme folder. Think there is a placeholder for that cacheburst. Do not know what should be entered to replace it.
i added
<script>
dojoConfig = {
isDebug: false,
useCustomLogger: true,
async: true,
baseUrl: "mxclientsystem/dojo/",
cacheBust: "636702985574099939",
rtlRedirect: "index-rtl.html"
};
</script>
in the body of index.html, index3.html and the admin.html, which solved the problem.
Previously i had added it only in index.html, but that was not enough