First when the export is over the message come like this -
Building of Android project failed, check output for the error.
Alternatively visit docs.godotengine.org for Android build documentation.
Then after closing it it shows the following -
FAILURE:Build failed with an exception
What went wrong:
A problem occured configuring root project 'build'.
Failed to install the following Android SDK packages as some licences have not been accepted.
build-tools;28.0.3 Android SDK Build-Tools 28.0.3
platforms;android-28 Android SDK Platform 28
To build this project,accept the sdk license agreements and install the missing components using the Android Studio SDK Manager.
Alternatively, to transfer the license agreements from one workstation to another , see http://d.android.com/r/studio-ui/export licenses.html
Using Android SDK: C:\Users*MyUserName*\Android_SDK
Run with --stacktrace option to get the stack trace.Run with --info or --debug option to get more log output.Run with --scan to get full insights
Exit code : 1
Build Failled in 8s