TYPO3 Exception 1289918325

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#1289918325: Module ‘my_module’ is not configured.

This message appears when trying to load a module from BE context menu. The module was configured in Route.php and loaded via BackendControllerHook.

This problem appears when changing a module name or when old module names are still cached (for example when upgrading the TYPO3 core or extensions).

The solution is to clear all caches (either via the install tool or if that does not help via manually removing the files in typo3temp).