Undefined array key "languages" in Toolkit

[bezin]

Hi @alnv,

thanks for this extension. I took over a project that uses CM and am tasked with upgrading it to the latest LTS and PHP version.
However CM does not seem to be compatible with PHP 8.2.

Contao 4.13.30
PHP 8.2.9
CM 1.32.36

ErrorException:
Warning: Undefined array key "languages"

  at vendor/alnv/catalog-manager/library/alnv/Toolkit.php:225
  at CatalogManager\Toolkit::parseCatalog()
     (vendor/alnv/catalog-manager/library/alnv/CatalogFieldBuilder.php:51)
  at CatalogManager\CatalogFieldBuilder->initialize()
     (vendor/alnv/catalog-manager/library/alnv/CatalogParser.php:21)
  at CatalogManager\CatalogParser->initialize()
     (vendor/alnv/catalog-manager/library/alnv/CatalogParser.php:38)
  at CatalogManager\CatalogParser->getAllEvents()
     (vendor/contao/calendar-bundle/src/Resources/contao/classes/Events.php:175)
  at Contao\Events->getAllEvents()
     (vendor/contao/calendar-bundle/src/Resources/contao/modules/ModuleEventlist.php:171)
  at Contao\ModuleEventlist->compile()
     (vendor/contao/core-bundle/src/Resources/contao/modules/Module.php:214)
  at Contao\Module->generate()
     (vendor/contao/calendar-bundle/src/Resources/contao/modules/ModuleEventlist.php:85)
  at Contao\ModuleEventlist->generate()
     (vendor/contao/core-bundle/src/Resources/contao/elements/ContentModule.php:98)
  at Contao\ContentModule->generate()
     (vendor/contao/core-bundle/src/Resources/contao/library/Contao/Controller.php:622)
  at Contao\Controller::getContentElement()
     (vendor/contao/core-bundle/src/Resources/contao/modules/ModuleArticle.php:197)
  at Contao\ModuleArticle->compile()
     (vendor/contao/core-bundle/src/Resources/contao/modules/Module.php:214)
  at Contao\Module->generate()
     (vendor/contao/core-bundle/src/Resources/contao/modules/ModuleArticle.php:70)
  at Contao\ModuleArticle->generate()
     (vendor/contao/core-bundle/src/Resources/contao/library/Contao/Controller.php:550)
  at Contao\Controller::getArticle()
     (vendor/contao/core-bundle/src/Resources/contao/library/Contao/Controller.php:392)
  at Contao\Controller::getFrontendModule()
     (vendor/contao/core-bundle/src/Resources/contao/pages/PageRegular.php:199)
  at Contao\PageRegular->prepare()
     (vendor/contao/core-bundle/src/Resources/contao/pages/PageRegular.php:60)
  at Contao\PageRegular->getResponse()
     (vendor/contao/core-bundle/src/Resources/contao/controllers/FrontendIndex.php:320)
  at Contao\FrontendIndex->renderPage()
     (vendor/symfony/http-kernel/HttpKernel.php:163)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw()
     (vendor/symfony/http-kernel/HttpKernel.php:75)
  at Symfony\Component\HttpKernel\HttpKernel->handle()
     (vendor/symfony/http-kernel/Kernel.php:202)
  at Symfony\Component\HttpKernel\Kernel->handle()
     (web/index.php:44)