Error: The archive is either unknown format or damaged

So it shows the error once the zip is downloaded and you try to open it, right?

It doesn’t really matter what theme or what method do you use for showing the button. It’s gotta be something with the server.

I coded this a while ago and I’m not sure how to debug it.

It show the error when I opened the zip. The zip can be downloaded but it’s only like 1kb. And when I open it, it gives me an error.

I also tried it on my localhost using xampp, but still the same.

Should it also work on localhost? What could be the problem?

thanks.

I wouldn’t know.

Are the images actually attached to the post or are they uploaded to the media gallery and then inserted into the post?

Yes they are attached to the post tried it again on localhost with the default theme but still no luck ??

Like I said the theme has nothing to do, it must be related to the server configuration (local server and production).

I would suggest trying another plugin.

Regards.

Hi vanduzled,

In my case removing this piece of code header('Content-Length: ' . filesize($file)); from the download.php file solved the problem. Hope this helps.

Seem to be having the same problem. Removing

header(‘Content-Length: ‘ . filesize($file));

Did not work.