Not working

[amghidh]

web version says:
download.js:94 GET https://crossorigin-originchanger.herokuapp.com/http://auth.ebookplus.pearsoncmg.com/products/CM67833580/pages/9782761399425_cover.pdf&hsid=d24a37068996c16d1bd51498607415b3 404 (Not Found)
downloadPdfPages @ download.js:94
(anonymous) @ download.js:356
Promise.then (async)
(anonymous) @ download.js:354
Promise.then (async)
getPageInfo @ download.js:353
(anonymous) @ download.js:399
Promise.then (async)
(anonymous) @ download.js:397
Promise.then (async)
window.doDownload @ download.js:396
(anonymous) @ VM160:1
errors.js:94 Uncaught (in promise) Error: Failed to parse PDF document (line:0 col:0 offset=0): No PDF header found
at e [as constructor] (errors.js:94)
at new e (errors.js:171)
at e.parseHeader (PDFParser.js:92)
at e. (PDFParser.js:44)
at tslib.es6.js:99
at Object.next (tslib.es6.js:80)
at tslib.es6.js:73
at new Promise ()
at i (tslib.es6.js:69)
at e.parseDocument (PDFParser.js:35)