NPE from MaterialTapTargetPrompt when setting typeface

Android version: 10
Phone model: Xiaomi Redmi Note 7 Pro (violet)
Briar version: 1.2.16 (8a534b45)

Stacktrace:

Attempt to read from field 'int android.graphics.Typeface.mStyle' on a null object reference
java.lang.NullPointerException: Attempt to read from field 'int android.graphics.Typeface.mStyle' on a null object reference
        at android.graphics.Typeface.create(Typeface.java:849)
        at uk.co.samuelwall.materialtaptargetprompt.extras.PromptUtils.setTypefaceFromAttrs(PromptUtils.java:127)
        at uk.co.samuelwall.materialtaptargetprompt.extras.PromptOptions.load(PromptOptions.java:248)
        at uk.co.samuelwall.materialtaptargetprompt.MaterialTapTargetPrompt$Builder.<init>(MaterialTapTargetPrompt.java:1139)
        at uk.co.samuelwall.materialtaptargetprompt.MaterialTapTargetPrompt$Builder.<init>(MaterialTapTargetPrompt.java:1122)
        at org.briarproject.briar.android.navdrawer.NavDrawerActivity.showTransportsOnboarding(NavDrawerActivity.java:489)
        at org.briarproject.briar.android.navdrawer.NavDrawerActivity.lambda$null$2(NavDrawerActivity.java:181)
        at org.briarproject.briar.android.navdrawer.NavDrawerActivity.lambda$null$2$NavDrawerActivity(Unknown Source:0)
        at org.briarproject.briar.android.navdrawer.-$$Lambda$NavDrawerActivity$xWqZhXc-2hRSJQvQHp-zwWTmweU.onChanged(Unknown Source:6)
        at org.briarproject.briar.android.util.UiUtils$3.onChanged(UiUtils.java:400)
        at androidx.lifecycle.LiveData.considerNotify(LiveData.java:131)
        at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:144)
        at androidx.lifecycle.LiveData$ObserverWrapper.activeStateChanged(LiveData.java:443)
        at androidx.lifecycle.LiveData$LifecycleBoundObserver.onStateChanged(LiveData.java:395)
        at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.java:361)
        at androidx.lifecycle.LifecycleRegistry.addObserver(LifecycleRegistry.java:188)
        at androidx.lifecycle.LiveData.observe(LiveData.java:203)
        at org.briarproject.briar.android.util.UiUtils.observeOnce(UiUtils.java:397)
        at org.briarproject.briar.android.navdrawer.NavDrawerActivity.lambda$onCreate$3(NavDrawerActivity.java:180)
        at org.briarproject.briar.android.navdrawer.NavDrawerActivity.lambda$onCreate$3$NavDrawerActivity(Unknown Source:0)
        at org.briarproject.briar.android.navdrawer.-$$Lambda$NavDrawerActivity$LIifbSpjf5QmEgmsWY6XA8WUmPg.onChanged(Unknown Source:4)
        at org.briarproject.briar.android.util.UiUtils$3.onChanged(UiUtils.java:400)
        at androidx.lifecycle.LiveData.considerNotify(LiveData.java:131)
        at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:149)
        at androidx.lifecycle.LiveData.setValue(LiveData.java:307)
        at androidx.lifecycle.MutableLiveData.setValue(MutableLiveData.java:50)
        at androidx.lifecycle.LiveData$1.run(LiveData.java:91)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:224)
        at android.app.ActivityThread.main(ActivityThread.java:7592)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

Log snippet:

03-16 17:09:44.556 I/TorPlugin: Country code: IN

Perhaps country code IN could mean that the system typeface is different than on our test devices?