Question mark in javascript source map

The source JS maps for the Kendo UI that I use do not display correctly in Chrome due to a question mark in the sources property. Does Chrome try to load js/src/js/? which simply returns a list of directories. After that, the debugger points to (index):9 for links to all mini-scripts.

 {"version":3,"file":"kendo.core.min.js","sources":["?","kendo.core.js"],"names":["f","define","$","undefined", "..."],"mappings":"CAAA,SAAUA,EAAGC,QACTA,...","sourceRoot":"../../src/js/"} 

What does the question mark mean? And is it necessary, or should I remove it in order to use the source maps correctly?

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Source: https://habr.com/ru/post/1209381/


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