SiriKit - Failed to attach to process?

Update: I'm getting this in console.log

Aug 15 11:43:43 iPhone assistantd(PlugInKit)[12442] <Info>: preparing plug-in <private>(<private>)

Aug 15 11:43:43 iPhone assistantd(PlugInKit)[12442] <Notice>: connection to plug-in <private>(0DDA43D4-A588-4478-8405-C219EAA7F591) lost

Aug 15 11:43:43 iPhone assistantd(PlugInKit)[12442] <Error>: Hub connection error Error Domain=NSCocoaErrorDomain Code=4097 "connection to service named com.appID.SiriKitExtension" UserInfo={NSDebugDescription=connection to service named com.appID.SiriKitExtension}

Aug 15 11:43:43 iPhone assistantd(PlugInKit)[12442] <Info>: beginUsing of 0DDA43D4-A588-4478-8405-C219EAA7F591 concludes with error=Error Domain=NSCocoaErrorDomain Code=4097 "connection to service named com.appID.SiriKitExtension" UserInfo={NSDebugDescription=connection to service named com.appID.SiriKitExtension}

Aug 15 11:43:43 iPhone assistantd(Foundation)[12442] <Notice>: PlugInKit error in beginUsing:

Aug 15 11:43:43 iPhone assistantd[12442] <Error>: __52-[ADExtensionService handleCommand:forDomain:reply:]_block_invoke_2.154 Error with extension request Error Domain=NSCocoaErrorDomain Code=4097 "connection to service named com.appID.SiriKitExtension" UserInfo={NSDebugDescription=connection to service named com.appID.SiriKitExtension}

Aug 15 11:43:43 iPhone assistantd(Foundation)[12442] <Notice>: killing invalid plugIn

Aug 15 11:43:43 iPhone assistantd[12442] <Error>: -[ADCommandCenter _handleServiceReply:error:forCommand:] Handling service error Error Domain=kAFAssistantErrorDomain Code=1301 "(null)" UserInfo={NSUnderlyingError=0x1005d1eb0 {Error Domain=NSCocoaErrorDomain Code=4097 "connection to service named com.appID.SiriKitExtension" UserInfo={NSDebugDescription=connection to service named com.appID.SiriKitExtension}}} for command <private>

I was having this issue as well earlier today because Xcode was giving me warnings that I should make my functions private for resolve methods (I am writing in Swift 3). Once I removed those public/private components from them, I have Siri responding to handle correctly but resolve methods are still not being called properly.

Another quick follow up.

I have everything working again after doing the following:

Added @escaping in front of the method's completion parameter like:

func resolveRadioType(forSetRadioStation intent: INSetRadioStationIntent, with completion: @escaping(INRadioTypeResolutionResult) -> Void)

and removed any public/private in front of the method name.