How to reproduce:

• on any page, load the browser developer tools
• go in the debugger tab of the developer tools
• explore the sources, for example for xwiki/resources/js/xwiki/meta.min.js
• the original source is not found
• in xwiki/resources/js/xwiki there is another subfolder js/xwiki which has a meta.js source displayed in it
• when clicking on this meta.js file, the file is not found

The same happens for all resources in xwiki/resources/uicomponents as well.

meta.js is supposed to be the non-minified version of meta.min.js but the maps on the server are pointing to the wrong paths, for example the map for meta.min.js is:

{
"version":3,
"file":"meta.min.js",
"lineCount":3,
"mappings":"...",
"sources":["js/xwiki/meta.js"],
"names":[...]
}

I assume sources should either be the absolute path /xwiki/resources/js/xwiki/meta.js or the relative path meta.js .