Drupal is a popular and best content management system. Even it is more powerful, and sometimes we have to deal with a tough time if we are not maintaining it well.
Here we see one of the issues that can happen in Drupal 8 if we do not correctly uninstall module before it removes from the file system. Your site might be working correctly on the production server, and the issues can arise after you move your site into a new server or after setup your local dev environment.