TYPO3 Exception 1328709784


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The finisher preset identified by “xxx” could not be found, or the implementationClassName was not specified.

This error is related to EXT:form.

You probably added a custom finisher to your current form configuration yaml file, but forgot to register the finisher in base config of your form setup.

Please ensure that you add your newly created form finisher to config section: TYPO3.CMS.Form.prototypes.standard.finishersDefinition

And that yaml is loaded to the plugin and/or module form settings: plugin.tx_form.settings.yamlConfigurations

It could also be the case that you correctly registered the finisher in the base config of your form setup (e.g. in the root template of your site) but the registration will not work because there might be a syntax error in the typoscript (e.g. a missing closing curly brace from an open code-block); in that case, the registration will not succeed and hence, the form framework is not able to find the finisher. This will most likely happen during a major upgrade of TYPO3 when there are typically bigger changes in your typoscript setup.