Error when editing Sidebars

[Siero]

We’re getting an “iframe cannot be loaded” error when we’re adding menus via the Cornerstone editor.

Our logs show the following error:

PHP message: PHP Warning:  array_key_exists() expects parameter 2 to be array, bool given in /home/[redacted]/public_html/wp-content/plugins/cornerstone/includes/extend/custom-sidebars.php on line 426

Our server reports the following versions:

PHP: 7.4.0
WordPress 5.3.1
X Theme: 7.1.2
Plugins:

• cornerstone: 4.1.2
• WP Mail SMTP: 1.7.1

[friech]

Hi @Siero,

Thank you for writing in, what you are seeing is the PHP Warning messages. This usually appears when a variable is null or not yet initialized. You can get rid of these messages by disabling your debug mode. You can do this by opening wp-config.php and adding

define('WP_DEBUG', false);

/* That's all, stop editing! Happy blogging. */

When you revisit the page, you should no longer be seeing the PHP Warning messages.

WP DEBUG

Cheers!