I found this error while exporting apk/sdk from android studio.
I dont know how to solve this.
Missing Gradle Project Information. Please check if the IDE successfully synchronized its state with the Gradle Project Model.
Just go to
Sync Project with Gradle Files. Hope this will work for you.
For those with the same problem, in android studio 3.1.4 it is just
file -> Sync Project with Gradle Files
Probably your project has been developed under another Gradle version. Try to read more about your problem here Android Studio Manifest Missing Error In Gradle