Warning: foreach() argument must be of type array|object, null given in Drupal\islandora_breadcrumbs\IslandoraBreadcrumbBuilder->nodeHasReferenceFields() (line 236 of /var/www/D9-find-copy/web/modules/contrib/islandora_breadcrumbs/src/IslandoraBreadcrumbBuilder.php)
#0 /var/www/D9-find-copy/web/core/includes/bootstrap.inc(164): _drupal_error_handler_real()
#1 /var/www/D9-find-copy/web/modules/contrib/islandora_breadcrumbs/src/IslandoraBreadcrumbBuilder.php(236): _drupal_error_handler()
#2 /var/www/D9-find-copy/web/modules/contrib/islandora_breadcrumbs/src/IslandoraBreadcrumbBuilder.php(75): Drupal\islandora_breadcrumbs\IslandoraBreadcrumbBuilder->nodeHasReferenceFields()
#3 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Breadcrumb/BreadcrumbManager.php(78): Drupal\islandora_breadcrumbs\IslandoraBreadcrumbBuilder->applies()
#4 /var/www/D9-find-copy/web/core/modules/system/src/Plugin/Block/SystemBreadcrumbBlock.php(72): Drupal\Core\Breadcrumb\BreadcrumbManager->build()
#5 /var/www/D9-find-copy/web/core/modules/block/src/BlockViewBuilder.php(171): Drupal\system\Plugin\Block\SystemBreadcrumbBlock->build()
#6 [internal function]: Drupal\block\BlockViewBuilder::preRender()
#7 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Security/DoTrustedCallbackTrait.php(111): call_user_func_array()
#8 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(797): Drupal\Core\Render\Renderer->doTrustedCallback()
#9 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(386): Drupal\Core\Render\Renderer->doCallback()
#10 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(458): Drupal\Core\Render\Renderer->doRender()
#11 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(204): Drupal\Core\Render\Renderer->doRender()
#12 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Template/TwigExtension.php(474): Drupal\Core\Render\Renderer->render()
#13 /var/www/D9-find-copy/web/sites/default/files/php/twig/653aa08cd54be_page.html.twig_Tvz1Zg2JbPjfxOUniRrm6d_jk/NC91H8a2FiN2x13E_D2VdoyVKd370KdEyRZ1vfw8r3A.php(192): Drupal\Core\Template\TwigExtension->escapeFilter()
#14 /var/www/D9-find-copy/vendor/twig/twig/src/Template.php(171): __TwigTemplate_1a6258a85d2f17c98b9d2a115230082a->block_content()
#15 /var/www/D9-find-copy/web/sites/default/files/php/twig/653aa08cd54be_page.html.twig_Tvz1Zg2JbPjfxOUniRrm6d_jk/NC91H8a2FiN2x13E_D2VdoyVKd370KdEyRZ1vfw8r3A.php(116): Twig\Template->displayBlock()
#16 /var/www/D9-find-copy/vendor/twig/twig/src/Template.php(394): __TwigTemplate_1a6258a85d2f17c98b9d2a115230082a->doDisplay()
#17 /var/www/D9-find-copy/vendor/twig/twig/src/Template.php(367): Twig\Template->displayWithErrorHandling()
#18 /var/www/D9-find-copy/vendor/twig/twig/src/Template.php(379): Twig\Template->display()
#19 /var/www/D9-find-copy/vendor/twig/twig/src/TemplateWrapper.php(40): Twig\Template->render()
#20 /var/www/D9-find-copy/web/core/themes/engines/twig/twig.engine(53): Twig\TemplateWrapper->render()
#21 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Theme/ThemeManager.php(372): twig_render_template()
#22 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(445): Drupal\Core\Theme\ThemeManager->render()
#23 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(204): Drupal\Core\Render\Renderer->doRender()
#24 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Template/TwigExtension.php(474): Drupal\Core\Render\Renderer->render()
#25 /var/www/D9-find-copy/web/sites/default/files/php/twig/653aa08cd54be_html.html.twig_JRjZVLj4-k14XCbLuXC2AC2Yz/EEBnjV-rqzr_oJwAdyipD1rtE9QwmjqqvE3eJpLJoxg.php(264): Drupal\Core\Template\TwigExtension->escapeFilter()
#26 /var/www/D9-find-copy/vendor/twig/twig/src/Template.php(394): __TwigTemplate_701a4a49d5d437b0375298be7141fef0->doDisplay()
#27 /var/www/D9-find-copy/vendor/twig/twig/src/Template.php(367): Twig\Template->displayWithErrorHandling()
#28 /var/www/D9-find-copy/vendor/twig/twig/src/Template.php(379): Twig\Template->display()
#29 /var/www/D9-find-copy/vendor/twig/twig/src/TemplateWrapper.php(40): Twig\Template->render()
#30 /var/www/D9-find-copy/web/core/themes/engines/twig/twig.engine(53): Twig\TemplateWrapper->render()
#31 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Theme/ThemeManager.php(372): twig_render_template()
#32 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(445): Drupal\Core\Theme\ThemeManager->render()
#33 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(204): Drupal\Core\Render\Renderer->doRender()
#34 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(158): Drupal\Core\Render\Renderer->render()
#35 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/Renderer.php(592): Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}()
#36 /var/www/D9-find-copy/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(159): Drupal\Core\Render\Renderer->executeInRenderContext()
#37 /var/www/D9-find-copy/web/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php(90): Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse()
#38 [internal function]: Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
#39 /var/www/D9-find-copy/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): call_user_func()
#40 /var/www/D9-find-copy/vendor/symfony/http-kernel/HttpKernel.php(186): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch()
#41 /var/www/D9-find-copy/vendor/symfony/http-kernel/HttpKernel.php(76): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#42 /var/www/D9-find-copy/web/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle()
#43 /var/www/D9-find-copy/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle()
#44 /var/www/D9-find-copy/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\Core\StackMiddleware\KernelPreHandle->handle()
#45 /var/www/D9-find-copy/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass()
#46 /var/www/D9-find-copy/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle()
#47 /var/www/D9-find-copy/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle()
#48 /var/www/D9-find-copy/web/core/lib/Drupal/Core/StackMiddleware/StackedHttpKernel.php(51): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#49 /var/www/D9-find-copy/web/core/lib/Drupal/Core/DrupalKernel.php(704): Drupal\Core\StackMiddleware\StackedHttpKernel->handle()
#50 /var/www/D9-find-copy/web/index.php(19): Drupal\Core\DrupalKernel->handle()
#51 {main}
could be related to this one: #11