Unity built apk stop running by ARCore dialog.

[UranusWang]

Descriptions:
1.I can run sample.apk perfectly on my phone Nexus 6p,maybe I can say the device is ok.
2.I replace unitygar.aar file on my Unity 2018.3.0f2 project,which is following Unity Build Instructions.
3.The apk built by myself stop running on my phone by the dialog "updated ARCore is required" after unity logo.

Questions:
1.Any settings or modifications are supposed to be done in my project?
2.Why my apk can not run on the same device as the sample.apk do?

@tomthecarrot

[UranusWang]

Could you provide your Unity sample project?
@tomthecarrot