---
title: "Troubleshooting"
manual: "Pagewide CSS classes"
version: "main"
permalink: "https://docs.typo3.org/permalink/svent/pageclasses:troubleshooting@main"
source: "Troubleshooting/Index.rst"
rendered: "2026-10-19T06:46:04+00:00"
---

# Troubleshooting {#troubleshooting}

Set a class in the constant
[defaultCssClass](https://docs.typo3.org/permalink/svent/pageclasses:confval-constants-defaultcssclass@main) first. It is added to
every page, so you can see whether the extension renders the body tag at all.
Reload the frontend and check the source code after every step.

1.  Make sure the extension is installed and the database fields exist
    (**Admin Tools > Maintenance > Analyze Database Structure**).
1.  Make sure the static template **Pagewide CSS Classes (pageclasses)**
    is included in your main TypoScript template (see
    [Include the TypoScript](https://docs.typo3.org/permalink/svent/pageclasses:installation-typoscript@main)). Check it with
    **Included TypoScript** in the TypoScript module
    (**Web > Template** in TYPO3 12,
    **Site Management > TypoScript** in TYPO3 13).
1.  `page.bodyTagCObject` may be set by another extension or by your own
    TypoScript. Find out with **Active TypoScript** in the same
    module and assign the
    plugin at the very end of your setup, see [Manual setup](https://docs.typo3.org/permalink/svent/pageclasses:configuration-manual-setup@main).
1.  Your `PAGE` object might not be called `page`. Check this in the same
    module.

![Template Analyzer listing the static template "Pagewide CSS Classes (pageclasses)"](../Images/template-analyser-v9.png)

![TypoScript Object Browser showing page.bodyTagCObject set to the pageclasses plugin](../Images/object-browser.png)