Android Studio Project Structure open failed

Question

Here is logout:

module editors was not disposed
java.lang.Throwable
    at com.intellij.openapi.diagnostic.Logger.error(Logger.java:113)

If I reopen my project, this error will disappear, and I can open the File Structure again.I want to know whether it's a bug of AS or my gradle installed error?

And here is an issue that will cause above problem:

'ComAndroidSupportAppcompatV71901.aar' already disposed:'ComAndroidSupportAppcompatV71901.aar' already disposed:
com.intellij.openapi.util.TraceableDisposable$DisposalException: 'ComAndroidSupportAppcompatV71901.aar' already disposed:
    at com.intellij.openapi.util.TraceableDisposable.throwDisposalError(TraceableDisposable.java:44)

Android Studio Version:0.4.3 build 133.988757

Answer 1

I managed to fix this by deleting "gradle" folder in every module inside of the project and then clicking on File -> Invalidate Caches / Restart.

So 2 steps:

1) Delete every "gradle" folder in every module inside of the project

2) Click on "File -> Invalidate Caches / Restart"