Fatal error: Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member function keyBy() on null in /www/htdocs/w014782d/domains/beemster-wp/htdocs/content/themes/beemster/resources/src/Beemster/Repository/StorySlideRepository.php:68 Stack trace: #0 [internal function]: Beemster\Repository\StorySlideRepository->Beemster\Repository\{closure}(Object(Beemster\Model\StorySlide), 7) #1 /www/htdocs/w014782d/domains/beemster-wp/vendor/illuminate/support/Arr.php(534): array_filter(Array, Object(Closure), 1) #2 /www/htdocs/w014782d/domains/beemster-wp/vendor/illuminate/support/Collection.php(362): Illuminate\Support\Arr::where(Array, Object(Closure)) #3 /www/htdocs/w014782d/domains/beemster-wp/htdocs/content/themes/beemster/resources/src/Beemster/Repository/StorySlideRepository.php(69): Illuminate\Support\Collection->filter(Object(Closure)) #4 /www/htdocs/w014782d/domains/beemster-wp/htdocs/content/themes/beemster/resources/src/Beemster/Controller/StoryController.php(67): Beemster\Repository\StorySlideReposit in /www/htdocs/w014782d/domains/beemster-wp/htdocs/content/themes/beemster/resources/src/Beemster/Repository/StorySlideRepository.php on line 68