Fatal error: Uncaught TypeError: Cannot assign null to property ExpertRelatedPost::$card_header_color of type string in /code/wp-content/themes/dac/inc/models/ExpertRelatedPost.php:99 Stack trace: #0 /code/wp-content/themes/dac/inc/models/ExpertRelatedPost.php(35): ExpertRelatedPost->setCardColors('localnews') #1 /code/wp-content/themes/dac/api/services/ContributingExpertService.php(398): ExpertRelatedPost->__construct(Object(WP_Post)) #2 /code/wp-content/themes/dac/api/services/ContributingExpertService.php(120): ContributingExpertService->matchPostsToExpert(Array, Object(ContributingExpert)) #3 /code/wp-content/themes/dac/single-contributing_experts.php(13): ContributingExpertService->getRelatedPosts(Object(ContributingExpert), 'en') #4 /code/wp-includes/template-loader.php(106): include('/code/wp-conten...') #5 /code/wp-blog-header.php(19): require_once('/code/wp-includ...') #6 /code/index.php(17): require('/code/wp-blog-h...') #7 {main} thrown in /code/wp-content/themes/dac/inc/models/ExpertRelatedPost.php on line 99