flutter error when using refactor extract flutter widget option in intellij idea

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When I am trying to use 'Refactor - Extract - flutter widget' option in Intellij idea for refactoring a code in a widget, I am getting following error.

Server error: Invalid parameter 'params.kind'. Expected to be RefactoringKind; found ""EXTRACT_WIDGET"".

There is no solution available on internet for this. Please help

Flutter doctor output

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel beta, v0.2.3, on Microsoft Windows [Version 10.0.16299.371], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK 27.0.1)
[√] Android Studio (version 3.0)
[√] IntelliJ IDEA Community Edition (version 2017.3)
[√] VS Code, 64-bit edition (version 1.22.2)
[√] Connected devices (1 available)

• No issues found!

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