Enabling Page-level ads breaks site and generates 3 dblog error entries

When enabling Page-level ads, 3 entries per page view are made to dblog (either for authenticated or anonymous).
Disabling Page-level ads removes the constant errors.

Notice: Undefined index: #tag en Drupal\Core\Render\Element\HtmlTag::preRenderHtmlTag() (línea 89 de /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Element/HtmlTag.php) #0 /var/www/vhosts/drupal/core/includes/bootstrap.inc(548): _drupal_error_handler_real(8, 'Undefined index...', '/var/www/vhosts...', 89, Array) #1 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Element/HtmlTag.php(89): _drupal_error_handler(8, 'Undefined index...', '/var/www/vhosts...', 89, Array) #2 [internal function]: Drupal\Core\Render\Element\HtmlTag::preRenderHtmlTag(Array) #3 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(376): call_user_func(Array, Array) #4 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(448): Drupal\Core\Render\Renderer->doRender(Array) #5 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(195): Drupal\Core\Render\Renderer->doRender(Array, true) #6 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(151): Drupal\Core\Render\Renderer->render(Array, true) #7 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(574): Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() #8 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(152): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #9 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(325): Drupal\Core\Render\Renderer->renderPlain(Array) #10 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(206): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->renderHtmlResponseAttachmentPlaceholders(Object(Drupal\Core\Render\HtmlResponse), Array, Array) #11 /var/www/vhosts/drupal/core/lib/Drupal/Core/EventSubscriber/HtmlResponseSubscriber.php(45): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments(Object(Drupal\Core\Render\HtmlResponse)) #12 /var/www/vhosts/drupal/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond(Object(Symfony\Component\HttpKernel\Event\FilterResponseEvent), 'kernel.response', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #13 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(184): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.response', Object(Symfony\Component\HttpKernel\Event\FilterResponseEvent)) #14 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(166): Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object(Drupal\Core\Render\HtmlResponse), Object(Symfony\Component\HttpFoundation\Request), 1) #15 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(64): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #16 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #17 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #18 /var/www/vhosts/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #19 /var/www/vhosts/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #20 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #22 /var/www/vhosts/drupal/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #23 /var/www/vhosts/drupal/core/lib/Drupal/Core/DrupalKernel.php(652): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #24 /var/www/vhosts/drupal/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #25 {main}.

Notice: Undefined index: #tag en Drupal\Core\Render\Element\HtmlTag::preRenderHtmlTag() (línea 86 de /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Element/HtmlTag.php) #0 /var/www/vhosts/drupal/core/includes/bootstrap.inc(548): _drupal_error_handler_real(8, 'Undefined index...', '/var/www/vhosts...', 86, Array) #1 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Element/HtmlTag.php(86): _drupal_error_handler(8, 'Undefined index...', '/var/www/vhosts...', 86, Array) #2 [internal function]: Drupal\Core\Render\Element\HtmlTag::preRenderHtmlTag(Array) #3 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(376): call_user_func(Array, Array) #4 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(448): Drupal\Core\Render\Renderer->doRender(Array) #5 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(195): Drupal\Core\Render\Renderer->doRender(Array, true) #6 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(151): Drupal\Core\Render\Renderer->render(Array, true) #7 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(574): Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() #8 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/Renderer.php(152): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #9 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(325): Drupal\Core\Render\Renderer->renderPlain(Array) #10 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(206): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->renderHtmlResponseAttachmentPlaceholders(Object(Drupal\Core\Render\HtmlResponse), Array, Array) #11 /var/www/vhosts/drupal/core/lib/Drupal/Core/EventSubscriber/HtmlResponseSubscriber.php(45): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments(Object(Drupal\Core\Render\HtmlResponse)) #12 /var/www/vhosts/drupal/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond(Object(Symfony\Component\HttpKernel\Event\FilterResponseEvent), 'kernel.response', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #13 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(184): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.response', Object(Symfony\Component\HttpKernel\Event\FilterResponseEvent)) #14 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(166): Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object(Drupal\Core\Render\HtmlResponse), Object(Symfony\Component\HttpFoundation\Request), 1) #15 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(64): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #16 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #17 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #18 /var/www/vhosts/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #19 /var/www/vhosts/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #20 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #22 /var/www/vhosts/drupal/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #23 /var/www/vhosts/drupal/core/lib/Drupal/Core/DrupalKernel.php(652): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #24 /var/www/vhosts/drupal/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #25 {main}.

Notice: Undefined offset: 1 en Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processHtmlHead() (línea 375 de /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php) #0 /var/www/vhosts/drupal/core/includes/bootstrap.inc(548): _drupal_error_handler_real(8, 'Undefined offse...', '/var/www/vhosts...', 375, Array) #1 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(375): _drupal_error_handler(8, 'Undefined offse...', '/var/www/vhosts...', 375, Array) #2 /var/www/vhosts/drupal/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(201): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processHtmlHead(Array) #3 /var/www/vhosts/drupal/core/lib/Drupal/Core/EventSubscriber/HtmlResponseSubscriber.php(45): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments(Object(Drupal\Core\Render\HtmlResponse)) #4 /var/www/vhosts/drupal/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond(Object(Symfony\Component\HttpKernel\Event\FilterResponseEvent), 'kernel.response', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #5 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(184): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.response', Object(Symfony\Component\HttpKernel\Event\FilterResponseEvent)) #6 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(166): Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object(Drupal\Core\Render\HtmlResponse), Object(Symfony\Component\HttpFoundation\Request), 1) #7 /var/www/vhosts/drupal/vendor/symfony/http-kernel/HttpKernel.php(64): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #8 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #9 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #10 /var/www/vhosts/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #11 /var/www/vhosts/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #12 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #13 /var/www/vhosts/drupal/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #14 /var/www/vhosts/drupal/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #15 /var/www/vhosts/drupal/core/lib/Drupal/Core/DrupalKernel.php(652): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #16 /var/www/vhosts/drupal/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #17 {main}.