Drupal 8.x

I am trying to retrieve a previous Drupal 8 site that I had stopped using some time ago. But, now I would like to republish it for some reason. I can see the website. But the images on the front page are not showing anymore. Could anyone please let me know how to start seeing these images? The link to the website is as follows.

https://japaneseautoworld.com/japaneseautoworld/

Thanks and regards

The website encountered an unexpected error. Please try again later.

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "post_type" entity type does not exist. in Drupal\Core\Entity\EntityTypeManager->getDefinition() (line 143 of core/lib/Drupal/Core/Entity/EntityTypeManager.php).

What is the general approach in determining what part of the Drupal structure Your_Module should ‘contact’? How do I find out where is the code which I’m trying to influence? I never seem to be able to quickly pinpoint which part of the Drupal universe I’m trying to influence.

Suppose, for instance, I want to ‘grab’ the body text of a content type which has just been added or edited. Where happens what? And how to find out? This undoubtedly sounds like a basic question. It is. That’s why I have the courage of asking it.

In the past, I used to manage a Drupal 8 site. Now I wanted to reuse that drupal site. I uploaded the data on the site. it has given me the following error message. Could anyone please guide me on how to handle these errors so that I can complete the installation?

File system

Hi team

I have an issue, i would like to know how to set cache to a json response,

I've created this controller and i've tried this: