Hi Huang, Frank,
Could you please try our SDK example application with your license key (Please make sure that you use the example app that was included with your SDK download package as we released a new version or our SDK just a few days ago and your exiting license key is not valid with this version anymore)?
So far I tried our Xamarin Component example with your license key in release configuration and had no issues. Could you send us a project that crashes? I would like to have a closer look at it.
I have a look at it and let you know once I need more information or have a explanation.
Same issues here with the xamarin component 5.3.0. With build configuration armv7+arm64 i get a crash on setLicenceKey() in release build. Without arm64 there are no crashes but like Huang said, apple requires arm64. I have atteched my crash log.