Copy a site to another domain

I needed to copy my multilanguage site to another domain, let's say copy site abc to site xyz.
These are the steps I followed:
1) clear cache on site abc
2) slqdump database site abc
3) create database xyz
4) import database abc into xyz
5) make a duplicate from webroot abc to xyz
6) make changes to settings.php for xyz
Unfortunately the home page is not comming up and I get next error:
 

Error: Call to a member function displaySubmitted() on null in template_preprocess_node() (line 582 of core/modules/node/node.module).
call_user_func_array() (Line: 285)
Drupal\Core\Theme\ThemeManager->render() (Line: 445)
Drupal\Core\Render\Renderer->doRender() (Line: 204)
Drupal\Core\Render\Renderer->render() (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 231)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 187)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 704)
Drupal\Core\DrupalKernel->handle() (Line: 19)

On the other hand when I enter any url on xyz the page is comming up as expected. So there is only a problem with my home page.
Under /admin/content I see the names of my home pages, but the content type is blank.
And under /admin/structure/types I  do not retrieve the content type my home page is created with. Instead here a content type named "missing" is added. And I can't manage the fields, display, permissions or delete it.
Any idea how to solve?