how can i slove the given issue while not disturb the built site in drupal

Question

I completely developed a website in Drupal 8 and then, finally delete 3 content types, because those required for me further, so due to this may give me an error "The website encountered an unexpected error. Please try again later."

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

Answer 1

Have you tried rebuilding the site registry? If you are using drugs you can run

drush rr

https://drushcommands.com/drush-8x/registry-rebuild/registry-rebuild/

Edit: Rebuilding the registry only works for drupal 7 and lower. You can try a cache rebuild

drush cr