After upgrading Drupal from 8.9 to 9.2 for several weeks I always get following error message when I use the command
drush upgradedb CiviCRM: System: Please specify a realistic site URL (Ex: drush -l http://example.com:456 ...)
When I ignore this message I can execute the upgradedb-command, but I still don't know whether this message points to some important information. I have no idea where I should specify the url.
Has anybody any idea?