Common or rare errors in php, Drupal, nodejs, magento

To downgrade ionic version use this command Note : You can downgrade to your old version by running: npm install -g ionic@3.4.0

If you Face this error in ionic : Error: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException:         :mergeArmv7DebugResources FAILED ionic 2 run ionic resources and check if any image is curruopted