Dev utility failed on IOS12.1

#1

Appium Version : 12.0.81.
Valid Apple developer license is already linked to Appium Studio.
Device: Iphone X
OS : 12.1

Try to Launch the Device from Appium Studio.
Below exception is thrown.

2018-10-08 07:28:13,791 [pool-14-thread-1–Open device Xxxxxxxxxxxxxxxxxxx] (device.ios.af) ERROR Failed to setup developer mode on device xxxxxxxxxxxxxxxxxxxxxxxx. Reason: Unknown. See stack trace.
com.experitest.image.agent.InternalException: Dev mode utility failed
at com.experitest.device.ios.af.ag(MyApplication:557)
at com.experitest.device.ios.af.eh(MyApplication:514)
at com.experitest.device.ios.H.(MyApplication:151)
at com.experitest.device.ios.H.dJ(MyApplication:109)
at com.experitest.device.ios.connection.k.pJ(MyApplication:453)
at com.experitest.device.ios.connection.k.oe(MyApplication:136)
at com.experitest.device.ios.connection.a.init(MyApplication:1321)
at com.experitest.device.ios.ac.a(MyApplication:77)
at com.experitest.device.ios.ac.c(MyApplication:56)
at com.experitest.device.ios.ac.b(MyApplication:46)
at com.experitest.device.ios.ac.a(MyApplication:36)
at com.experitest.image.agent.appiphone.f.yW(MyApplication:1742)
at com.experitest.image.agent.appiphone.f.yt(MyApplication:269)
at com.experitest.image.agent.appiphone.f.b(MyApplication:204)
at com.experitest.image.agent.appiphone.f.init(MyApplication:176)
at com.experitest.image.agent.appiphone.a.bn(MyApplication:1164)
at com.experitest.image.agent.appiphone.a.bi(MyApplication:1071)
at imagestudio.i.a.fv(MyApplication:93)
at imagestudio.i.e.fv(MyApplication:13)
at com.experitest.device.y.a(MyApplication:555)
at com.experitest.image.agent.appiphone.a.bm(MyApplication:210)
at imagestudio.actions.aw.TR(MyApplication:381)
at com.experitest.utils.a.h.run(MyApplication:41)
at com.experitest.utils.bi.call(MyApplication:24)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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