Unable to merge dex error : <p>This is my app build.gradle file
<a href="https://i.stack.imgur.com/kKH77.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kKH77.png" alt="enter image description here"></a></p>

<p>It shows error in the appcompat dependecy file. I tried clean project and build project and so many ways but still the error shows. This is my error when i run project.</p>

<p>**Error:Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.</p>

<blockquote>
  <p>java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex**</p>
</blockquote>
