Dump class loading information after extension installation
An installation without composer which should be upgraded. During upgrade wizards the installation of compatiblity6 is chosen.
The extension is installed and upgrade can be performed afterwards.
An exception is thrown "$hookObject \TYPO3\CMS\Compatibility6\Hooks\ExtTablesPostProcessing\TcaMigration must implement interface TYPO3\\CMS\\Core\\Database\\TableConfigurationPostProcessingHookInterface".
The exception is thrown because \TYPO3\CMS\Compatibility6\Hooks\ExtTablesPostProcessing\TcaMigration cannot be resolved due to missing autoload information.