f:uri.resource() in f:be.pageRenderer causes SystemResourceDefinitionNotFoundException in TYPO3 14

[mayfeld]

TYPO3 Version: 14.3.1 (Classic Mode)
Extension Version: er24_rechtstexte 4.0.0
PHP Version: 8.4.21
Description:
Opening the eRecht24 backend module throws a fatal SystemResourceDefinitionNotFoundException, making the module completely unusable.
Exception:
#1763381519 TYPO3\CMS\Core\SystemResource\Exception\SystemResourceDefinitionNotFoundException
Project path "typo3conf/ext/er24_rechtstexte/Resources/Public/Css/BackendModule.css?1778334320" is not allowed. Define custom resources if required.
Root Cause:
In Resources/Private/Layouts/Backend.html, the CSS file is passed to f:be.pageRenderer using f:uri.resource():
html<f:be.pageRenderer includeCssFiles="{0: '{f:uri.resource(path: 'Css/BackendModule.css')}'}"
f:uri.resource() generates a URL with an appended file modification timestamp (e.g. ...BackendModule.css?1778334320). TYPO3 14's PageRenderer::addCssFile() passes this string through the new SystemResource API, which cannot handle paths containing query string parameters — causing the exception.
Fix:
Replace the dynamic f:uri.resource() call with a static EXT: path, which PageRenderer resolves correctly through the package system:
html<f:be.pageRenderer includeCssFiles="{0: 'EXT:er24_rechtstexte/Resources/Public/Css/BackendModule.css'}"
This bypasses the timestamp issue and allows the SystemResource API to resolve the path correctly.

[LvckyAPI]

Thanks for letting me know about the error.
I'll take a look at it.

It's strange that this problem didn't come up during my tests. 👀

[isoskic]

Probably the same cause:
TYPO3 14.3.3
PHP 8.4
Extension: 4.0.0

(1/1) #1476107295 TYPO3\CMS\Core\Error\Exception
PHP Warning: file_exists(): open_basedir restriction in effect.
File(/typo3conf/ext/er24_rechtstexte/Resources/Public/Css/BackendModule.css?1780667324) is not within the allowed path(s): (/var/www/vhosts/typo3-master/:/tmp/) in /var/www/vhosts/typo3-master/typo3_src-14.3.3/typo3/sysext/core/Classes/SystemResource/SystemResourceFactory.php line 98