In a fresh NEOS-installation I seen those error-messages in the backend Configuration/Setup:
Settings.TYPO3.Flow.security.authentication.providers.Typo3SetupProvider.requestPatterns.controllerObjectName -> expected: type=dictionary, null found: type=string
Settings.TYPO3.Flow.security.authentication.providers.Typo3BackendProvider.requestPatterns.Flowpack\Neos\FrontendLogin\Security\NeosRequestPattern -> expected: type=dictionary, null found: type=string
Settings.TYPO3.Flow.security.authentication.providers.Flowpack.Neos.FrontendLogin:Frontend.requestPatterns.Flowpack\Neos\FrontendLogin\Security\NeosRequestPattern -> expected: type=dictionary, null found: type=string