How to reproduce:
1. Open the attached "1062202_repro.zip" project
2. Open the "inductionAR" scene
3. Enter the Play mode

Expected result: Editor does not crash.
Actual result: Editor crashes.

Reproducible with - 2017.1.5f1, 2017.2.3p2, 2017.4.8f1, 2018.1.9f1, 2018.2.1f1, 2018.3.0a6

Note: The issue seems to be caused by the deactivated Canvas GameObject in the scene.

Stack trace:
(Unity) GameObject::IsActive
(Unity) FindActiveTransformWithPathImpl
(Unity) FindActiveTransformWithPath
(Unity) GameObject_CUSTOM_Find
(Mono JIT Code) (wrapper managed-to-native) UnityEngine.GameObject:Find (string)
(Mono JIT Code) MergeCube.MergeCubeCore:UpdateScale ()
(Mono JIT Code) [C:\Users\QA Students\Desktop\1062202\Assets\MergeCubeSDK\Scripts\Core\MergeCubeSDK.cs:731] MergeCube.MergeCubeSDK:HandleDataUpdateEvent ()
(Mono JIT Code) [C:\Users\QA Students\Desktop\1062202\Assets\MergeCubeSDK\Scripts\Core\MergeCubeSDK.cs:717] MergeCube.MergeCubeSDK:RegisterListeners ()
(Mono JIT Code) [C:\Users\QA Students\Desktop\1062202\Assets\MergeCubeSDK\Scripts\Core\MergeCubeSDK.cs:356] MergeCube.MergeCubeSDK:OnValidate ()
(Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
(mono) [c:\buildslave\mono\build\mono\mini\mini.c:4937] mono_jit_runtime_invoke
(mono) [c:\buildslave\mono\build\mono\metadata\object.c:2623] mono_runtime_invoke
(Unity) scripting_method_invoke
(Unity) ScriptingInvocation::Invoke
(Unity) ScriptingInvocation::InvokeChecked
(Unity) MonoBehaviour::CallMethodInactive
(Unity) MonoBehaviour::CheckConsistency
<...>