IssueTracker

https://github.com/maour/kotlinSample for test

Not reproduced, can you please share complete error log here.

Hm! I don't know but maybe an IDE restart was needed, now it can offer refactoring and providing backup to zip file, but after running it says "No usage found in the project".
I also updated everything to latest version.

Source code provided for test https://github.com/maour/kotlinSample

there are some support libraries

    implementation("com.android.support:appcompat-v7:28.0.0")
    implementation("com.android.support:design:28.0.0")
    implementation("com.android.support:support-v4:28.0.0")
    implementation("com.android.support:appcompat-v7:28.0.0")
    implementation("com.android.support:recyclerview-v7:28.0.0")
    implementation("com.android.support:cardview-v7:28.0.0")



Build: $VERSION, AI-183.5429.30.34.5370308, 201903122114,

AI-183.5429.30.34.5370308, JRE 1.8.0_152-release-1343-b01x64 JetBrains s.r.o, OS Mac OS X(x86_64) v10.14.3, screens 1680x1050; Retina

Android Gradle Plugin: 3.4.0-rc02
Gradle: 5.1.1
NDK: from local.properties: 20.0.5344622-beta1; latest from SDK: (not found);
LLDB: pinned revision 3.1 not found; latest from SDK: (package not found);
CMake: from local.properties: (not specified); latest from SDK: 3.6.0-rc2; from PATH: 3.13.2;

KTS files are not fully supported at the moment, so issues are expected. Thanks for filing this.

Hi,
Thanks for your patience. AndroidX refactoring is now fixed for KTS and should land in AS 4.0 Beta 1.