Got the below error while enabling the dempo theme.
Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: You have requested a non-existent service "file_url_generator". Did you mean this: "url_generator"? in Drupal\Component\DependencyInjection\Container->get()
I have attached a screenshot for better reference.
Drupal version: 9
Install the dempo drupal theme with the above versions. Install and set default the dempo theme You will get the website encountered error.
replace the Drupal Drupal::service('file_url_generator'). This service used after Drupal 9.3.x versions and not in the 9.2.x version.
\Drupal::service('file_url_generator')->generateString(theme_get_setting('logo.url'));
Fixed
1.0
Code
For the temporary fix, just created the patch to resolve this website encountered error removed the "file_url_generator" service in the material_base.theme file.