Cannot modify header information

Yeah, I second that, It happens with non-English LifterLMS websites. With newly added lessons only, whether I hit edit lesson from inside the course builder or from the courses > lessons tab.

Maybe it’s related to the lesson slug or something. I hope the support team has a solution to this issue!

Hi @0rbita,

From what it looks like there is a template override that’s causing the issue.

There is a great walk through to fixing pluggable.php issues here: https://www.wpbeginner.com/wp-tutorials/how-to-fix-pluggable-php-file-errors-in-wordpress/

Let us know if you have any questions about this process!

Thanks and take care,