Runtime error: Cannot find the component "numero"

Please someone help, why is this not working? Everytime i try to run it with the Emulator on my laptop that warning pops up: Runtime Error. Cannot find the component numero

Also this: "Error from Companion: invoke: no method named `AppName' in class"

I copied it from here: Cómo crear una PANTALLA DE INICIO o SPLASH SCREEN - MIT App Inventor 2 - YouTube

Lola_Maq.aia (10.7 KB)