Error from Companion: invoke: no method named `AppName' in class edu.mit.appinventor.aicompanion3.Screen1

[RamNaresh]

Perhaps this error could have been because of,

Error from Companion: invoke: no method named `Column' in class edu.mit.appinventor.aicompanion3.Screen1

Hello Warren Does your device (Android Phone) regularly up date your Apps automatically? It sounds as though your App Inventor Project is using a component or block that the Companion does not recognise - if so, it might be out of date since a newer one was recently released @ Google Play.