Hello @doufenglai,
The plugin creates a copy of the purchased file to a protected directory: “/sell-downloads/sd-downloads”, and then allows the user download the file using a script as proxy for controlling the number of downloads, when the product was purchased, etc.
If the download is failing, the possible causes are:
– The location of the original file (entered through the product’s settings) is wrong, and the file is not accessible from the plugin’s code.
– The execution time assigned to the PHP script in your server is not sufficient to copy the file to the protected directory, and download it.
– The amount of memory assigned to the PHP script is not enough for processing the download file.
If you need I check your store in detail, please, create a ticket in my private website:
https://cff.dwbooster.com/contact-us
Best regards.