No installed build tools found. Install the Android build tools version 30.0.3 or higher

No installed build tools found. Install the Android build tools version xx.x.x or higher

For me it was just because I could not find the tab in the android studio on where to install build tools. It is actually called SDK Tools under the SDK Manager.

1. Click on SDK Manager
2. Click from the first tab SDK Platforms to SDK Tools.
3. SDK Tools and click on show package details and install 31.0.0