booster: Null pointer exception crash

Basic environment info:

• System version 6.0.1

• Java version 8

• Gradle version 6.6.1

• Android Gradle plugin version 4.0.0

• Booster version 3.1.0

• Stack traces

Fatal Exception: java.lang.NullPointerException
Attempt to invoke virtual method 'java.lang.String java.io.File.getParent()' on a null object reference
com.didiglobal.booster.instrument.sharedpreferences.SharedPreferencesManager.<init> (SharedPreferencesManager.java:36)
com.didiglobal.booster.instrument.sharedpreferences.BoosterSharedPreferences.<init> (BoosterSharedPreferences.java:42)
com.didiglobal.booster.instrument.sharedpreferences.BoosterSharedPreferences.getSharedPreferences (BoosterSharedPreferences.java:58)
com.didiglobal.booster.instrument.ShadowSharedPreferences.getSharedPreferences (ShadowSharedPreferences.java:15)
com.google.android.gms.internal.ads.zzabb.initialize (zzabb.java:33)
com.google.android.gms.internal.ads.zzabf.zzi (zzabf.java:15)
com.google.android.gms.internal.ads.zzabe.get (zzabe.java)
com.google.android.gms.ads.internal.util.zzbu.zza (zzbu.java:13)
com.google.android.gms.internal.ads.zzabf.initialize (zzabf.java:1)
com.google.android.gms.internal.ads.zzanc.run (zzanc.java:2)
java.lang.Thread.run (Thread.java:818)

Gradle dependencies :

dependencies {
            classpath "com.didiglobal.booster:booster-gradle-plugin:$booster_version"
            classpath "com.didiglobal.booster:booster-transform-shared-preferences:$booster_version"
            classpath "com.didiglobal.booster:booster-transform-thread:$booster_version"
            classpath "com.didiglobal.booster:booster-transform-activity-thread:$booster_version"
            classpath "com.didiglobal.booster:booster-transform-finalizer-watchdog-daemon:$booster_version"
        }

After using booster, received many this type of crash in firebase console. Please make me know whether I use booster improperly or this is bug.