TYPO3 Core

Finisher config:

-
  options:
  message: ''
  contentElementUid: '1352'
  identifier: Confirmation

The content element resides on a sysfolder.

Error:

(1/1) #1257246929 TYPO3Fluid\Fluid\View\Exception\InvalidTemplateResourceException

Tried resolving a template file for controller action "FormFrontend->render" in format ".html", but none of the paths contained the expected template file (FormFrontend/Render.html). The following paths were checked: /var/www/vendor/typo3/cms-fluid-styled-content/Resources/Private/Templates/, /var/www/vendor/reelworx/rm-sitesetup/Resources/Private/Templates/Content/

This works with v11 and breaks with v12.

The offending line is: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77252/20/typo3/sysext/form/Classes/Domain/Finishers/ConfirmationFinisher.php#103