Hello there @gabrielflow,
I hope this email finds you well. Thank you for reaching out and bringing this issue to our attention. We apologise for the late response.
We have reviewed the error message you’ve encountered, and it appears to be associated with the MailPoet plugin installed on your website. The warning you’re seeing, “Cannot modify header information – headers already sent,” typically occurs when something is being sent to the browser before the server expects it. This could happen due to several reasons such as earlier output from a PHP file, including white spaces, or other characters before PHP opening tags, or conflicts with other plugins or themes.
To assist you further and provide a resolution, we would like to collect a bit more information:
- Has any custom modification been made to the MailPoet plugin files, especially around the mentioned Cookies.php file?
- Can you confirm if the error appears immediately after MailPoet plugin updates or was noticed at a different time?
- Could you please verify if the error persists when other plugins are disabled, to check for potential conflicts?
- It would be helpful to know the PHP version running on your server along with the current version of the MailPoet plugin you’re using.
We’re here to help get this sorted out as soon as possible. Once we receive your responses, we will investigate further and provide you with the steps to resolve this error.
Looking forward to hearing back from you.
