Hi Klaus,
our projects include the PDF.js library to reliably display PDF files, which works fine in most default webserver configurations. However, it doesn't work when using the krpano testing server, which is sometimes used by our customers to view a project without the need for a internet connection. The problem is caused by '.mjs' files included in PDF.js, which need to be served as 'text/javascript'.
Would it be possible for you to add the correct MIME type to the testing server?
Kind regards
Christian