Invoke: no method named `ReadColumn' in class com.google.appinventor.components.runtime.Spreadsheet

[ABG]

@Jerome_Toutee

I can't find in the emulator GUI how to run the just installed APK

This is tricky.

Close whatever app is currently running, or look for the Android control that gets you to its 'desktop'.

Look for a ^ somewhere in the middle, and drag that up to see all installed apps.
Video at

Windows 64-bit Emulator Open Beta

For future reference, here are two short videos on how to identify the Companion version in the new emulator. (The aistarter command line window also identifies the version found as an integer.) Starting the Emulator (leftover app session still in progress in the Companion) Identifying the Companion Version ...