Error while uploading to play store

I am receiving an error while trying to upload my app bundle to Google play store

“You uploaded an APK or Android App Bundle which has an activity, activity alias, service or broadcast receiver with intent filter, but without ‘android:exported’ property set. This file can’t be installed on Android 12 or higher. See: developer.android.com/about/versions/12/behavior-changes-12#exported

I tried searching the error in the community but was not able to find a proper solution.

I am trying to upload an app with firebase database data exchange and activity starters. I tried removing the activity starters. But error persists… Can any one help me with this issue.

for what are your app and to what ?