어떻게 해결해야 할까요 ...
Hello 쌤 금, welcome to the forum
Translation: how to solve?
This is apparently an issue with AiStarter. The mixture of English and Korean seems unusual, note the Unicode error.
I will assign this Topic to the developer of the new emulator.
In the meantime, if you have a smartphone, test your Apps on the phone using the MIT App Inventor Companion App or by building an APK.