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Hosting runs on Windows Server 2019, everything works on localhost. I think maybe the problem is in the handler mapping and I need to add support for .cch. But how is this format processed? Please help anyone who has encountered or understands. I say right away, I didn't make any mistakes in the Url, everything is correctly named. Tried to keep resources and .the js file is in the same folder along with the html, the same problem.