Recoverable error: Argument 1 passed to Landesmuseum\Provider\ContactPersonProvider::render() must implement interface MetaModels\IItem, null given, called in /usr/www/users/landeu/system/modules/landesmuseum/library/Landesmuseum/Provider/ContactPersonProvider.php on line 115 and defined in system/modules/landesmuseum/library/Landesmuseum/Provider/ContactPersonProvider.php on line 141
#0 system/modules/landesmuseum/library/Landesmuseum/Provider/ContactPersonProvider.php(141): __error(4096, 'Argument 1 pass...', '/usr/www/users/...', 141, Array)
#1 system/modules/landesmuseum/library/Landesmuseum/Provider/ContactPersonProvider.php(115): Landesmuseum\Provider\ContactPersonProvider->render(NULL)
#2 templates/project/rsce_contactperson.html5(21): Landesmuseum\Provider\ContactPersonProvider->searchForAndRender('13')
#3 system/modules/core/library/Contao/BaseTemplate.php(88): include('/usr/www/users/...')
#4 system/modules/core/library/Contao/Template.php(238): Contao\BaseTemplate->parse()
#5 system/modules/core/classes/FrontendTemplate.php(38): Contao\Template->parse()
#6 system/modules/core/elements/ContentElement.php(189): Contao\FrontendTemplate->parse()
#7 composer/vendor/madeyourday/contao-rocksolid-custom-elements/src/MadeYourDay/Contao/Element/CustomElement.php(41): Contao\ContentElement->generate()
#8 system/modules/core/library/Contao/Controller.php(469): MadeYourDay\Contao\Element\CustomElement->generate()
#9 system/modules/core/modules/ModuleArticle.php(187): Contao\Controller::getContentElement(Object(Contao\ContentModel), 'main')
#10 system/modules/core/modules/Module.php(154): Contao\ModuleArticle->compile()
#11 system/modules/core/modules/ModuleArticle.php(50): Contao\Module->generate()
#12 system/modules/core/library/Contao/Controller.php(405): Contao\ModuleArticle->generate(false)
#13 system/modules/core/library/Contao/Controller.php(269): Contao\Controller::getArticle(Object(Contao\ArticleModel), false, false, 'main')
#14 system/modules/core/pages/PageRegular.php(129): Contao\Controller::getFrontendModule('0', 'main')
#15 system/modules/core/controllers/FrontendIndex.php(250): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#16 index.php(20): Contao\FrontendIndex->run()
#17 {main}

Fatal error: Call to a member function parseValue() on a non-object in /usr/www/users/landeu/system/modules/landesmuseum/library/Landesmuseum/Provider/ContactPersonProvider.php on line 149