anuzpuri

FYI if you need the link to open on a new window

CF7 File Download > classes > class-cf7-file-download.php > Line 165

jQuery('body').append('<a target="_blank" id="cf7fd-attachment-link" href="<?php echo $catalog_url;?>" download="<?php echo $filename;?>"></a>');

I had this problem also, it happened when I tried to activate from the same screen when you install from your dashboard.

The fix for me was to install the plugin, and after I got the message, I went to the plugins page and clicked Activate

Working for me fine now, but I hope this does get fixed!

PS copied from – https://www.ads-software.com/support/topic/the-plugin-does-not-have-a-valid-header-150/ @mchelles

• This reply was modified 4 years, 5 months ago by anuzpuri.