[Bug]: Settings: Variable background is broken since 26.9

[tatasha2004]

Prerequisites

• I've read and understood the contribution guidelines.
• I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened

Settings: Variable background is broken since 26.9

Step-by-step reproduction instructions

1. Install Yoast SEO Free 26.9
2. Go to https://basic.wordpress.test/wp-admin/admin.php?page=wpseo_page_settings#/homepage
3. Insert variable for SEO title or description

Expected results

Actual results

Screenshots, screen recording, code snippet

No response

Which editor is affected (or editors)

• Block Editor
• Gutenberg Editor
• Elementor Editor
• Classic Editor
• Other (please specify in additional info)

Which browser is affected (or browsers)

• Chrome
• Firefox
• Safari
• Other (please specify in additional info)

Device you are using

No response

Operating system

No response

PHP version

No response

WordPress version

6.9.1

WordPress Theme

No response

Yoast SEO version

26.9

Gutenberg plugin version (if relevant)

No response

Elementor plugin version (if relevant)

No response

Classic Editor plugin version (if relevant)

No response

Relevant plugins in case of a bug

No response