WP Table Builder – Cannot modify header warning in admin panel

Hello,

I am experiencing a warning message in the WordPress admin panel when creating a new page. The warning appears at the top of the page but disappears once the editor fully loads. The message is:

Warning: Cannot modify header information - headers already sent by (output started at /wp-content/plugins/wp-table-builder/v2/inc/Utils/Assets.php:78) in /wp-admin/admin-header.php on line 9

Upon investigating the issue, I found that line 78 in Assets.php contains the following code:

echo '<script type="text/javascript">var WPTB_CFG = ' . json_encode($data) . ';</script>';

This direct echo statement is causing the issue because it outputs content before WordPress can modify headers.

Could you please confirm if this is a known issue and whether a fix is planned for future updates? Thank you for your assistance.

WordPress: 6.7.2
PHP version: 8.4.3 (Supports 64bit values)

Best regards,
Stas

• This topic was modified 1 year, 3 months ago by Stas.