Error in user YAML: (<unknown>): found character that cannot start any token while scanning for the next token at line 5 column 16

---
title: Fix cms page won't add custom css classes.
issue: NEXT-29203
author: Mario Schierhoff
author_email: [email protected]
author_github: @derkaito
---

Storefront

Changed cmsPageClasses variable in storefront/page/content/index.html.twig to get css class from cmsPage variable instead of global page.landingPage