Error when run Android studio IDE

Question

When I launch Android studio I encounter this Error:

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Answer 1

Try to rename folder 21.1.2 inside Android SDK build-tools folder (in my case it was c:\Users\prokofyev\AppData\Local\Android\sdk\build-tools\21.1.2) to android-5.0 (in my case it became c:\Users\prokofyev\AppData\Local\Android\sdk\build-tools\android-5.0). This way I fixed similar error on new Android Studio installation.