Service "debug.security.access.decision_manager" is defined in file security_debug.xml (in SecurityBundle) which is only loaded when kernel.debug is true. However, this service is also used in collectors.xml, which is always loaded.

In env=prod this will give the following error:

[Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]
The service "profiler" has a dependency on a non-existent service "debug.security.access.decision_manager".

This issue was introduced in Symfony 3.1. I temp fixed it by overriding the service and removing the argument.