Call to an undefined function drupal_get_path()

I have also face the same issue, after install city_zymphonies_theme & i have solution to fix this issue.
Please open the city_zymphonies_theme.theme file in the path of ( themes/contrib/city_zymphonies_theme/city_zymphonies_theme.theme )
In the line 126 they have mention the drupal_get_path function theme of city_zymphonies_theme. so please add the drupal_get_path() after end of this city_zymphonies_theme_get_slider_content function.

Here is this drupal_get_path() :

function drupal_get_path($type, $name) {
/**
drupal_get_path('module', 'node') \Drupal::service('extension.list.module')->getPath('node')
drupal_get_path('theme', 'seven') \Drupal::service('extension.list.theme')->getPath('seven')
drupal_get_path('profile', 'standard') \Drupal::service('extension.list.profile')->getPath('standard')
*/
switch ($type) {
case 'module':
return \Drupal::service('extension.list.module')->getPath($name);
break;
case 'theme':
return \Drupal::service('extension.list.theme')->getPath($name);
break;
case 'profile':
return \Drupal::service('extension.list.profile')->getPath($name);
break;
return false;
}
}

After add this drupal_get_path() function, drush cr & check.

Since there is no available patch/MR, the status is still Active.

Since the theme uses core_version_requirement: ^8 || ^9 || ^10, the solution cannot be simply to use the service that replaces that function, as the service is not defined in Drupal 8.

Hello @Harshita mehna, I have fixed issue created MR.
please review & retest it.
Thanks

See my previous comment.

Hello apaderno, I create MR for D9 & D10.
Thanks

Yet, the MR does not correctly fix the issue.
Since the theme is marked as compatible with Drupal 8, either the fix works for Drupal 8 too, or the theme is not anymore compatible with Drupal 8 and must be marked as not compatible with Drupal 8.

Let's use a single issue, as both the issues need to change the minimum required Drupal version.