The problem concerns the reproduction of the error sent by the user. There is a website that uses Quaderno Checkout for payment.

<head> <script src="https://checkout.quaderno.io/checkout.js"></script> </head>

What could be the reasons for the script not to load?

I managed to find only the situation when the connection was no longer safe. For example, due to an incorrectly set date on the computer. Current SSL certificate is valid until DD.MM.2019. Thus, if the user has moved the date, the script will not load. What else?

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    Alternatively, you can ask the user for a screenshot of the browser console, then it may become clearer. Because the problem may not be in the download, but in the execution of the file (for example, the old IE does not support any new method) - Sergey Glazirin
  • In this case, it is known that the user has Chrome. - angry
  • I would like to add a window.QuadernoCheckout check and if it is null, show the user some meaningful message. - angry
  • The reasons may be a bunch, a virus in the user's browser that blocks the download of JS files, or as often happens, the user has an extension installed in the browser (ADBlock or something like that) and the extension may block JS. Let the user try through another browser. - Arsen
  • @Arsen thanks for the tip. AdBlock is really worth checking out. - angry

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