OSSystemExtensionErrorDomain error 9 while trying to run the SimpleAudioDriverExtension

Video: https://developer.apple.com/videos/play/wwdc2021/10190/

I'm trying to run the sample code from the SimpleAudioExtension workshop I get a validation error for OSSystemExtensionErrorDomain. Is there something that is missing from the instructions that is required to work around this error? If not, how would one work around this?

OSSystemExtensionErrorDomain error 9 while trying to run the SimpleAudioDriverExtension
 
 
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