secure connection failed when “Redirect to file” dl

Hello,
Please visit https://eurekaformations.fr/catalogue-de-formation/

In the second download button “le planning 2023”.

I unchecked the “redirect to a file”. And impossible to download, I have an error.
As soon as I reactivate it, or on the other downloads, it works.

How can I correct this?
My client doesn’t want downloads to open under popup anymore, because too much pobleme with safari, so he asks me to disable all “redirect to file”.)

Thanks

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