Unknown policy: '4' error under Mojave 10.14.6 (18G5033)

[natpicone]

Hi,
Using Mojave 10.14.6 (18G5033) built without issues but now every time I try to sudo I got

*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff3c2cb9a9 __exceptionPreprocess + 256
	1   libobjc.A.dylib                     0x00007fff669d3a17 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff3c2cb7db +[NSException raise:format:] + 201
	3   SharedUtils                         0x00007fff403ee1a1 +[LAErrorHelper raiseExceptionOnError:] + 182
	4   LocalAuthentication                 0x00007fff4040aade -[LAClient evaluatePolicy:options:uiDelegate:reply:] + 479
	5   LocalAuthentication                 0x00007fff4040ad86 -[LAClient evaluatePolicy:options:reply:] + 99
	6   LocalAuthentication                 0x00007fff4040f065 __42-[LAContext evaluatePolicy:options:reply:]_block_invoke + 131
	7   libdispatch.dylib                   0x00007fff6815563d _dispatch_client_callout + 8
	8   libdispatch.dylib                   0x00007fff68158374 _dispatch_block_invoke_direct + 256
	9   libdispatch.dylib                   0x00007fff68158254 dispatch_block_perform + 124
	10  LocalAuthentication                 0x00007fff4040ef3e -[LAContext evaluatePolicy:options:reply:] + 226
	11  LocalAuthentication                 0x00007fff4040f567 -[LAContext evaluatePolicy:options:error:] + 244
	12  LocalAuthentication                 0x00007fff40410a10 __37-[LAContext canEvaluatePolicy:error:]_block_invoke + 425
	13  LocalAuthentication                 0x00007fff40410b8d __37-[LAContext canEvaluatePolicy:error:]_block_invoke.103 + 16
	14  libsystem_trace.dylib               0x00007fff683b4714 _os_activity_initiate_impl + 53
	15  LocalAuthentication                 0x00007fff404107c6 -[LAContext canEvaluatePolicy:error:] + 264
	16  pam_watchid.so.2                    0x000000010e111d1e pam_sm_authenticate + 1438
	17  libpam.2.dylib                      0x00007fff67157d64 openpam_dispatch + 500
	18  libpam.2.dylib                      0x00007fff671590ba pam_authenticate + 35
	19  sudo                                0x000000010e02b4af sudo + 62639
	20  sudo                                0x000000010e032704 sudo + 91908
	21  sudo                                0x000000010e0337c7 sudo + 96199
	22  sudo                                0x000000010e01e66e sudo + 9838
	23  sudo                                0x000000010e042c98 sudo + 158872
	24  sudo                                0x000000010e0230ea sudo + 28906
	25  libdyld.dylib                       0x00007fff681a23d5 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Build using

Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15)
Target: x86_64-apple-darwin18.7.0

[natpicone]

Ok, just found that deviceOwnerAuthenticationWithBiometricsOr requires MacOS 10.15+.
https://developer.apple.com/documentation/localauthentication/lapolicy/deviceownerauthenticationwithbiometricsorwatch

Maybe a check can help avoid breaking the authentication layer.