Call to a member function isEnvironmentInBackendMode() on null

[idsolutions-maoh]

hello zeroseven-team,

we have an issue with your extension which makes no sence for us. in backend everything works, but in frontend we get this error: Call to a member function isEnvironmentInBackendMode() on null

please have a look to the screenshot.

we hope you can help us.

regards, markus

[neufeind]

$uriBuilder is not instantiated via Extbase thus no injections for the EnvironmentService are processed.

Workaround in AbstractMenu:

replace:
$this->uriBuilder = GeneralUtility::makeInstance(UriBuilder::class);
with:
$objectManager = GeneralUtility::makeInstance(\TYPO3\CMS\Extbase\Object\ObjectManager::class);
$this->uriBuilder = $objectManager->get(UriBuilder::class);