TYPO3 Core

With TYPO3 v13.4.8 I get the following exception message when the template of an Extbase plugin cannot be found:

#1257246929 TYPO3Fluid\Fluid\View\Exception\InvalidTemplateResourceException
Tried resolving a template file for controller action "MyController->show" in format ".html", but none of the paths contained the expected template file (MyController/Show.html). The following paths were checked: /var/www/html/vendor/user/my_extension/Resources/Private/Templates/

Now, with TYPO3 v13.4.9 the following wrong exception message is returned:

#1742058289 TYPO3Fluid\Fluid\View\Exception\InvalidTemplateResourceException
PAGEVIEW TypoScript object: Failed to resolve the expected template file "Pages/Default.html" for layout "default". See also: https://docs.typo3.org/permalink/t3tsref:cobj-pageview@13.4. The following paths were checked: EXT:my_site/Resources/Private/Templates/Pages/Default.html, ...