Shapediver - Can't download a file from an embedded Iframe

when trying to download a file from an Iframe i get this message from chrome console:

Download is disallowed. The frame initiating or instantiating the download is sandboxed, but the flag ‘allow-downloads’ is not set. See Chrome Platform Status for more details.

How can I solve it?

Could you post a link to the iframe here? By PM if needed. And also a link to the related ShapeDiver model. It is likely that this error is caused by setting of the website you are embedding the iframe in.