I have tried installing JA Page Builder but get this error at the top of the admin page:
Notice: Undefined index: HTTP_X_FORWARDED_PORT in E:\xampp2019\htdocs\landscape\plugins\system\jabuilder\jabuilder.php on line 47
Everything seems to have been installed, but things don't work. For example when I try to add a header, it says 'rendering module' but nothing happens.
Any suggestion how to fix this?