TYPO3 Core

TYPO3 11.5.29

Core: Error handler (BE): PHP Warning: file_exists(): open_basedir restriction in effect. File(/typo3conf/ext/my_ext/Resources/Public/Css/facility-backend.css) is not within the allowed path(s)

The css file is included by the asset viewhelper (i think with the right notation):

<f:asset.css identifier="backendfacility" href="EXT:bbb_facility/Resources/Public/Css/facility-backend.css" />

And this generates an absolut path, interesting because the general utility say some different here:

GeneralUtility.php line 2318:

$fileExists = file_exists($path);

And the $path variable comes from here: GeneralUtility.php line 2298:

if ($isFrontend) {
 // Frontend should still allow /static/myfile.css - see #98106
 // This should happen regardless of the incoming path is absolute or not
 $path = self::resolveBackPath(self::dirname(Environment::getCurrentScript()) . '/' . $path);
} elseif (!PathUtility::isAbsolutePath($path)) {
 // Backend and non-absolute path
 $path = self::resolveBackPath(self::dirname(Environment::getCurrentScript()) . '/' . $path);
}

So the comment say: "Backend and non-absolute path" but the resulting path is an absolute path?

And what is this condition realy about, both cases makes the same, i can not see any different?