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Looper error in SplashScreenActivity on 5.0.1 with support library 23.2.1

org.briarproject E/ACRA: ACRA caught a InflateException for org.briarproject
android.view.InflateException: Binary XML file line #2: Error inflating class PreferenceScreen
    at android.support.v7.preference.PreferenceInflater.createItem(PreferenceInflater.java:262)
    at android.support.v7.preference.PreferenceInflater.onCreateItem(PreferenceInflater.java:281)
    at android.support.v7.preference.PreferenceInflater.createItemFromTag(PreferenceInflater.java:290)
    at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:161)
    at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:117)
    at android.support.v7.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:115)
    at android.support.v7.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:328)
    at android.support.v7.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:287)
    at org.briarproject.android.SplashScreenActivity$2.run(SplashScreenActivity.java:93)
Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.newInstance(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
    at android.support.v7.preference.PreferenceInflater.createItem(PreferenceInflater.java:256)
    at android.support.v7.preference.PreferenceInflater.onCreateItem(PreferenceInflater.java:281) 
    at android.support.v7.preference.PreferenceInflater.createItemFromTag(PreferenceInflater.java:290) 
    at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:161) 
    at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:117) 
    at android.support.v7.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:115) 
    at android.support.v7.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:328) 
    at android.support.v7.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:287) 
    at org.briarproject.android.SplashScreenActivity$2.run(SplashScreenActivity.java:93) 
Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
    at android.os.Handler.<init>(Handler.java:200)
    at android.os.Handler.<init>(Handler.java:114)
    at android.support.v7.preference.PreferenceGroup.<init>(PreferenceGroup.java:61)
    at android.support.v7.preference.PreferenceGroup.<init>(PreferenceGroup.java:87)
    at android.support.v7.preference.PreferenceScreen.<init>(PreferenceScreen.java:84)
    at java.lang.reflect.Constructor.newInstance(Native Method) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:288) 
    at android.support.v7.preference.PreferenceInflater.createItem(PreferenceInflater.java:256) 
    at android.support.v7.preference.PreferenceInflater.onCreateItem(PreferenceInflater.java:281) 
    at android.support.v7.preference.PreferenceInflater.createItemFromTag(PreferenceInflater.java:290) 
    at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:161) 
    at android.support.v7.preference.PreferenceInflater.inflate(PreferenceInflater.java:117) 
    at android.support.v7.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:115) 
    at android.support.v7.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:328) 
    at android.support.v7.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:287) 
    at org.briarproject.android.SplashScreenActivity$2.run(SplashScreenActivity.java:93)

Reverting to 23.1.1 stops the error.