Error while executing am start -n / Error type 3 error activity class

[lletsdevapps]

I purchased a source code from codecanyon and i modified it by changing the package name and application id and json file .. but when i tried to test the app on android studio emulator i've got this error message... I'm a beginner and don't have any skills on codes engineering.
Thanks guys.

[react-native-bot]

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