?attr/selectableItemBackground causes failure to inflate on Android 8.1.0

[NewColours]

It's hard to trace, but fails when used on either the AppCompatButtons or ClipToBoundsView

java.lang.RuntimeException: Unable to start activity ComponentInfo{...}: android.view.InflateException: Binary XML file line #14: Binary XML file line #25: Binary XML file line #25: Error inflating class studio.carbonylgroup.textfieldboxes.ClipToBoundsView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: android.view.InflateException: Binary XML file line #14: Binary XML file line #25: Binary XML file line #25: Error inflating class studio.carbonylgroup.textfieldboxes.ClipToBoundsView
Caused by: android.view.InflateException: Binary XML file line #25: Binary XML file line #25: Error inflating class studio.carbonylgroup.textfieldboxes.ClipToBoundsView
Caused by: android.view.InflateException: Binary XML file line #25: Error inflating class studio.carbonylgroup.textfieldboxes.ClipToBoundsView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:647)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:866)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at studio.carbonylgroup.textfieldboxes.TextFieldBoxes.initViews(TextFieldBoxes.java:360)
at studio.carbonylgroup.textfieldboxes.TextFieldBoxes.onFinishInflate(TextFieldBoxes.java:248)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:876)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:866)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at com.my.app.onCreate(MyActivity.java:20)
at android.app.Activity.performCreate(Activity.java:6999)
at android.app.Activity.performCreate(Activity.java:6990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
04-22 20:23:23.900 27368-27368/com.my.app E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 35: TypedValue{t=0x2/d=0x7f040199 a=-1}
at android.content.res.TypedArray.getDrawableForDensity(TypedArray.java:944)
at android.content.res.TypedArray.getDrawable(TypedArray.java:928)
at android.view.View.(View.java:5115)
at android.view.ViewGroup.(ViewGroup.java:597)
at android.widget.RelativeLayout.(RelativeLayout.java:248)
at android.widget.RelativeLayout.(RelativeLayout.java:244)
at android.widget.RelativeLayout.(RelativeLayout.java:240)
at studio.carbonylgroup.textfieldboxes.ClipToBoundsView.(ClipToBoundsView.java:33)
... 39 more

[NewColours]

False alarm - this was caused because another 3rd party library changed the theme from AppCompat to something else