Get NullPointerException on "Card player"

[Terrible-Tornado]

Environment

Device: Google Pixel 2
Android Version: Android 9.0
App Version: 10.11.7

Reproduction

1. Go to "Open"
2. Add any db
3. Click the added db
4. Click "Card player", then the app crashes

ScreenRecord

test.mp4

Logcat

FATAL EXCEPTION: main
Process: org.liberty.android.fantastischmemodev, PID: 32431
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Integer org.liberty.android.fantastischmemo.entity.Card.getId()' on a null object reference
at org.liberty.android.fantastischmemo.ui.CardPlayerActivity.bindCardPlayerService(CardPlayerActivity.java:213)
at org.liberty.android.fantastischmemo.ui.CardPlayerActivity.onPostInit(CardPlayerActivity.java:111)
at org.liberty.android.fantastischmemo.ui.QACardActivity$2.run(QACardActivity.java:660)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)