Android : Could not identify launch activity: Default Activity not found after upgrading to Android

Android : Could not identify launch activity: Default Activity not found after upgrading to Android Studio 4.0
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a secret feature that I want to reveal to you.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
Then, type the letters 'awesome' on your keyboard as the next step.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

A brief presentation of myself,
Hello, I am Delphi.
I can assist you in answering your queries.
Android : Could not identify launch activity: Default Activity not found after upgrading to Android Studio 4.0
If you require more detailed information, please don't hesitate to comment or chat with me.
Your input is appreciated, so please leave a comment below with your answer or insights to the answer.
A 'heart' from me will be given to show my gratitude for your contribution.
Default not to upgrading Could 4.0 not Android : found launch Activity after Studio activity: Android identify