This is happening when I try to install a new site on a multi-site Drupal installation where all other sites work fine.
Error
TypeError: Unsupported operand types: array + null in Drupal\views\Plugin\views\field\FieldPluginBase->advancedRender() (line 1183 of /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/field/FieldPluginBase.php)
#0 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/views.theme.inc(238): Drupal\views\Plugin\views\field\FieldPluginBase->advancedRender(Object(Drupal\views\ResultRow))
#1 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Theme/ThemeManager.php(287): template_preprocess_views_view_field(Array, 'views_view_fiel...', Array)
#2 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(422): Drupal\Core\Theme\ThemeManager->render('views_view_fiel...', Array)
#3 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(201): Drupal\Core\Render\Renderer->doRender(Array, false)
#4 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/field/FieldPluginBase.php(1745): Drupal\Core\Render\Renderer->render(Array)
#5 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/style/StylePluginBase.php(779): Drupal\views\Plugin\views\field\FieldPluginBase->theme(Object(Drupal\views\ResultRow))
#6 [internal function]: Drupal\views\Plugin\views\style\StylePluginBase->elementPreRenderRow(Array)
#7 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Security/DoTrustedCallbackTrait.php(101): call_user_func_array(Array, Array)
#8 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(772): Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_ren...', 'exception', 'Drupal\\Core\\Ren...')
#9 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(363): Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array)
#10 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(201): Drupal\Core\Render\Renderer->doRender(Array, false)
#11 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/style/StylePluginBase.php(718): Drupal\Core\Render\Renderer->render(Array)
#12 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/style/StylePluginBase.php(584): Drupal\views\Plugin\views\style\StylePluginBase->renderFields(Array)
#13 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/style/StylePluginBase.php(475): Drupal\views\Plugin\views\style\StylePluginBase->renderGrouping(Array, Array, true)
#14 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/display/DisplayPluginBase.php(2170): Drupal\views\Plugin\views\style\StylePluginBase->render(Array)
#15 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/ViewExecutable.php(1533): Drupal\views\Plugin\views\display\DisplayPluginBase->render()
#16 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Plugin/views/display/Page.php(199): Drupal\views\ViewExecutable->render()
#17 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/ViewExecutable.php(1630): Drupal\views\Plugin\views\display\Page->execute()
#18 /homepages/28/d41073845/htdocs/drupal9/core/modules/views/src/Element/View.php(81): Drupal\views\ViewExecutable->executeDisplay('page_1', Array)
#19 [internal function]: Drupal\views\Element\View::preRenderViewElement(Array)
#20 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Security/DoTrustedCallbackTrait.php(101): call_user_func_array(Array, Array)
#21 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(772): Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_ren...', 'exception', 'Drupal\\Core\\Ren...')
#22 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(363): Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array)
#23 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(201): Drupal\Core\Render\Renderer->doRender(Array, false)
#24 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(241): Drupal\Core\Render\Renderer->render(Array, false)
#25 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/Renderer.php(564): Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}()
#26 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(242): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))
#27 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(132): Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\CurrentRouteMatch))
#28 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php(90): Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\CurrentRouteMatch))
#29 [internal function]: Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object(Symfony\Component\HttpKernel\Event\ViewEvent), 'kernel.view', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher))
#30 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(142): call_user_func(Array, Object(Symfony\Component\HttpKernel\Event\ViewEvent), 'kernel.view', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher))
#31 /homepages/28/d41073845/htdocs/drupal9/vendor/symfony/http-kernel/HttpKernel.php(163): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object(Symfony\Component\HttpKernel\Event\ViewEvent), 'kernel.view')
#32 /homepages/28/d41073845/htdocs/drupal9/vendor/symfony/http-kernel/HttpKernel.php(80): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)
#33 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#34 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#35 /homepages/28/d41073845/htdocs/drupal9/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#36 /homepages/28/d41073845/htdocs/drupal9/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#37 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#38 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#39 /homepages/28/d41073845/htdocs/drupal9/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#40 /homepages/28/d41073845/htdocs/drupal9/core/lib/Drupal/Core/DrupalKernel.php(708): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#41 /homepages/28/d41073845/htdocs/drupal9/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#42 {main}