Error when updating Drupal core?

Updated the core of Drupal in version 7.64, to version 8.6.13, after update doesn't open the website, and you receive the following:

The website encountered an unexpected error. Please try again later.Symfony\Component\HttpKernel\Exception\NotFoundHttpException: in Drupal\Core\PathProcessor\PathProcessorFront->processInbound() (line 43 of core/lib/Drupal/Core/PathProcessor/PathProcessorFront.php).

When you try the command /update.php the following appears:

The website encountered an unexpected error. Please try again later. Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: You have requested a non-existent service "access_check.db_update". in Symfony\Component\DependencyInjection\ContainerBuilder->getDefinition() (line 1053 of vendor/symfony/dependency-injection/ContainerBuilder.php).

How to fix this error, without using a saved copy of the website?
March 19th 20 at 08:31
1 answer
March 19th 20 at 08:33
Drupal 7 and Drupal 8 is backwards incompatible and have completely different architecture. Just updated so will not work, need to do the migration using the migrate module, which is already part of core in Drupal 8.

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