IDEALENS K2 with Unity cannot wakeup demo scene

I have throw the question some forum. https://teratail.com/questions/88432
And, I study English a little, if you don't read this, sorry.

I can build and install in the device. And display draw unity splash screen.
But this app can not run the demo scene.

I had get the crash report in logcat.

08-16 14:42:20.939 21153 21186 I up      : VR Resume done
08-16 14:42:20.940  2200  2342 D         : setup crgp info, pid:21186, core:6, prio:-14, sched:2
08-16 14:42:20.940  2200  2342 D         : orig cpu_set[0]=0x000000f0, pid:21186
08-16 14:42:20.940  2200  2342 D         : new cpu_set[0]=0x00000040, pid:21186
08-16 14:42:20.940  2200  2200 D         : setup crgp info, pid:21166, core:7, prio:-14, sched:2
08-16 14:42:20.940  2200  2200 D         : orig cpu_set[0]=0x000000f0, pid:21166
08-16 14:42:20.940  2200  2200 D         : new cpu_set[0]=0x00000080, pid:21166
08-16 14:42:20.940 21153 21186 I up      : VR Resume:0x200626
08-16 14:42:20.940 21153 21186 I up      : Already focused, skipping
08-16 14:42:20.947 21153 21232 E cmp     : Nothing valid to draw, sleepTime:15679.538556
08-16 14:42:20.960 21153 21232 E cmp     : Nothing valid to draw, sleepTime:15679.545066
08-16 14:42:20.967 21153 21232 E cmp     : Nothing valid to draw, sleepTime:15679.551476
08-16 14:42:20.973 21153 21232 E cmp     : Nothing valid to draw, sleepTime:15679.557986
08-16 14:42:20.974 21153 21242 D Unity   : Setting up 1 worker threads for Enlighten.
08-16 14:42:20.975 21153 21243 D Unity   :   Thread -> id: ffffffffd5280930 -> priority: 1
08-16 14:42:20.977 21153 21166 F libc    : Fatal signal 11 (SIGSEGV), code 1, fault addr 0x84 in tid 21166 (UnityMain)
08-16 14:42:20.980 21153 21232 E cmp     : Nothing valid to draw, sleepTime:15679.564396
08-16 14:42:20.980 21153 21197 E Unity   : java.net.UnknownHostException: Unable to resolve host "cdp.cloud.unity3d.com": No address associated with hostname
08-16 14:42:20.980 21153 21197 E Unity   :
08-16 14:42:20.980 21153 21197 E Unity   : (Filename: ./PlatformDependent/AndroidPlayer/WebRequest/Transports/TransportAndroid.cpp Line: 393)
08-16 14:42:20.980 21153 21197 E Unity   :

I had tried some unity version. And had tried some Android build tools version.

That do not reach to resolve.

Please help me.

Thanks.