'Instruments Usage Error: Specified target process is invalid' when launching

I am trying to deploy the FaceAR example from Unreal 4.23.0 to iOS from Mac but I’m getting the error ‘Instruments Usage Error: Specified target process is invalid’ however the launch is successful.
When I play the application on the iPhone I’m deploying to, the app shows a blackscreen and doesn’t continue after spitting out the error ‘Unable to read full network header’.

I am pretty sure I’ve setup the certificate, provision and Team ID correctly and they all appear valid.

I have attached the log here.

I am using the newest version of Catalina and xCode.

Any help would be appreciated.