Creating standalone app fails with php8.1

[fliespl]

In FileLoader.php line 182:
                                                                                                                                                                                                                                    
  Expected to find class "App\Command\ServeCommand" in file "/home/flies/workspace/tools/freddie/src/Command/ServeCommand.php" while importing services from resource "../src/", but it was not found! Check the namespace prefix   
   used with the resource in /home/flies/workspace/tools/freddie/config/services.yaml (which is being imported from "/home/flies/workspace/tools/freddie/src/Kernel.php").