Upgrading Drupal

Hello,
I encounter the following problem. I have migrated from D7 to D8. All content has been successfully migrated. But when I access it, only the title is displayed. The content does not appear or edit nor change the input format (full html, etc ...).
If I look at the node__body table I see that all the content is migrated correctly. I've also tried to change the value in the body_format column to full_html ... without success.

Has anything else happened to someone else?

Thanks for the help!

En français plus bas
-------------------------------------------------------------------------------------
Hello,

Some month ago, I spent my sites in drupal 7. It works, except my images, it does not appear. We do not even see the small square usually present when the image is not present.

My Settings:

I am trying to resurrect a small Drupal 6 website by upgrading to Drupal 7 using the migrate_d2d UI tools. The legacy Drupal 6 site has several content types which are cck-defined. In step 5 of the migrate_d2d UI process, the migration tools correctly recognize all the Drupal 6 content types, including those that are cck-defined, but in the Drupal 7 'Destination Type' drop-down, I am only given a choice of Article, Basic page, Forum topic, Product, or Webform.

On a D8 site, when I run the composer outdated command to check for components that need updating, composer produces a list, as follows:

php composer.phar outdated

Drupal8 maintenance/updating is a nightmare.

1. It is readily apparent that Drupal 8 cannot be upgraded by hand because of the giant black hole known as the /vendor directory where core keeps 3rd party libraries/components, and where contrib modules also install yet more libraries/components, all of which must be tracked by various .json files in order to fully recognized by the system.

I want to ignore all the Drupal 7.4x etc and directly from current 7.37 to Drupal 7.53.

Is that allowed or a big risk to do it?