Crash opening FaceARSample on iOS

FaceARSample is crashing as soon as it is opened on iOS. Tested on a iPhoneXS 12.4. 

Regression: Yes I was able to get FaceARSample on the same device the previous release 4.22.

1. Open /Samples/AR/FaceARSample/FaceARSample.uproject
2. Launch on to IOS device (tested on iPhone XS)
3. When completed tap the FaceARSample icon on the iOS device

Result: Crash

Fix UE-51650

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