Hi,
This indicates that the PHP running on your server does not have permission to access the logo image in order to include it in the PDF.
The first thing to do is to temporarily change the logo to one hosted on another server that you know does not have protection measures against this.
For example, try using this image (
www.google.fr/images/branding/googlelogo...t_color_272x92dp.png
), which is Google's logo.
If it works with the Google logo but not with your own, it's likely that your site’s `.htaccess` file (or another system like ProxyShield:
forums.phpfreaks.com/topic/162357-solved...-that-a-browser-can/
) has restrictions on the "user-agent", preventing the plugin’s PHP code from accessing your logo.
However, if you encounter the same issue even with the Google logo, then it's more likely related to your PHP configuration, which is blocking external connections (particularly due to the `allow_url_fopen` flag in `php.ini`):
ask.gibbonedu.org/t/allow-url-fopen-1-wont-work/2981/15