To Solve Could not resolve all files for configuration ':app:devDebugRuntimeClasspath'. Could not resolve net.minidev:json-smart:[1.3.1,2.3]. Required by: project :app Error Just Open your android/app/build.gradle file and add this line at the bottom of your build.gradle: com.google.gms.googleservices.GoogleServicesPlugin.config.disableVersionCheck = true and now, re-run your project.