---
title: "TYPO3 Exception 1187176358"
manual: "TYPO3 Exceptions"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3exceptions:typo3-exception-1187176358"
source: "Exceptions/1187176358.rst"
modified: "2026-09-16T07:39:08+00:00"
---

# TYPO3 Exception 1187176358

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## #1187176358: The controller name must be a valid string, integer given.

`\TYPO3\CMS\Extbase\Mvc\Exception\InvalidControllerNameException` thrown in
file `typo3_src/typo3/sysext/extbase/Classes/Mvc/Request.php`.

## Possible error sources

### configurePlugin: Actions declared incorrectly

This error happens when the first array does have an integer as key
instead of the plugin name:

```
array('show')
```

The correct solution is this:

```
\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
    'FooExt',
    'PluginName',
    [\Foo\Ext\Controller\PluginController::class => 'show'],
    [\Foo\Ext\Controller\PluginController::class => 'show'] // non-cacheable actions
);
```