java - Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease' - 


buildtypes {     release {          minifyenabled true         proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'     } }

when make proguard app. following error:

error:execution failed task ':app:transformclassesandresourceswithproguardforrelease'


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