android.view.InflateException: Binary XML file CheckBox

I have published an application and I see that some users keep getting errors when they are in the sign-up activity.

The error I'm getting is:

Fatal Exception: java.lang.RuntimeException
Unable to start activity ComponentInfo{com.xxx.yyy/com.xxx.yyy.SignUpActivity}: android.view.InflateException: Binary XML file line #137 in com.xxx.yyy:layout/activity_sign_up: Binary XML file line #137 in com.xxx.yyy:layout/activity_sign_up: Error inflating class CheckBox

When I go to layout/activity_sign_up to line 137 I got this:

<CheckBox
    android:id="@+id/cb_showPass"
    android:layout_width="32dp"
    android:layout_height="32dp"
    android:background="@drawable/cb_visible_styles"
    android:button="@null"
    android:scaleX="0.6"
    android:scaleY="0.6"
    app:layout_constraintBottom_toBottomOf="@+id/et_SignUpPassword"
    app:layout_constraintEnd_toEndOf="@+id/et_SignUpPassword"
    app:layout_constraintTop_toTopOf="@+id/et_SignUpPassword" />

Which is used to show the eye in the EditText:

The drawable/cb_visible_styles is:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/cb_show" android:state_checked="false" />
    <item android:drawable="@drawable/cb_hide" android:state_checked="true" />
    <item android:drawable="@drawable/cb_show" />
</selector>

Where cb_show/cb_hide are png files:

I can't figure out what causes the error.

Thank you