Error:Gradle: Execution failed for task ':app:crashlyticsCleanupResourcesDebug'. > Crashlytics Developer Tools error
You need to add your API Key to the Android Manifest:
<application> <meta-data android:name="com.crashlytics.ApiKey" android:value="your key here" /></application>
This method solved my problem:
Remove or Comment this line (build.gradle):
// apply plugin: 'io.fabric'
or if you have an ApiKey, define fabric ApiKey (AndroidManifest.xml)
<meta-data android:name="io.fabric.ApiKey" android:value="yourApiKey012356465654" />
If you only want to compose a tweet with the SDK you can remove the line
apply plugin: 'io.fabric'
And the gradle build will work correctly