Could not find com.nbsp:library:1.8.

[long1eu]

I'm getting this error when I try to sync the project.

Could not find com.nbsp:library:1.8.
Searched in the following locations:
    file:/Users/long1eu/Library/Android/sdk/extras/m2repository/com/nbsp/library/1.8/library-1.8.pom
    file:/Users/long1eu/Library/Android/sdk/extras/m2repository/com/nbsp/library/1.8/library-1.8.jar
    file:/Users/long1eu/Library/Android/sdk/extras/google/m2repository/com/nbsp/library/1.8/library-1.8.pom
    file:/Users/long1eu/Library/Android/sdk/extras/google/m2repository/com/nbsp/library/1.8/library-1.8.jar
    file:/Users/long1eu/Library/Android/sdk/extras/android/m2repository/com/nbsp/library/1.8/library-1.8.pom
    file:/Users/long1eu/Library/Android/sdk/extras/android/m2repository/com/nbsp/library/1.8/library-1.8.jar
    file:/Applications/Android Studio.app/Contents/gradle/m2repository/com/nbsp/library/1.8/library-1.8.pom
    file:/Applications/Android Studio.app/Contents/gradle/m2repository/com/nbsp/library/1.8/library-1.8.jar
    https://dl.google.com/dl/android/maven2/com/nbsp/library/1.8/library-1.8.pom
    https://dl.google.com/dl/android/maven2/com/nbsp/library/1.8/library-1.8.jar
    https://jcenter.bintray.com/com/nbsp/library/1.8/library-1.8.pom
    https://jcenter.bintray.com/com/nbsp/library/1.8/library-1.8.jar
Required by:
    project :app > project :flutter_document_picker

this are my dep:

repositories {
    maven {
        url  "http://dl.bintray.com/lukaville/maven"
    }
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
    implementation 'com.android.support:support-compat:27.1.0'
    implementation 'com.android.support:appcompat-v7:27.1.0'
    implementation 'com.android.support:animated-vector-drawable:27.1.0'
    implementation 'com.android.support:design:27.1.0'
    implementation 'com.nbsp:library:1.8'
}

[long1eu]

apparently it was a bintray issue