"Drush sqlc < myfile.sql" doesn't return the site to previously working state. Are there files to be deleted?
The website encountered an unexpected error. Please try again later.


There was an error on PHP that Drupal couldn't handle.



If you have your install set to log errors, check the report.

Another option, on your settings.php add:

$config['system.logging']['error_level'] = 'verbose';


To show the errors.