【tess-two】データファイルが見つからないエラー

Androidアプリ開発の勉強中です
tess-twoを用いて画像の文字認識をするサンプルプログラムを試しているのですが、

Data file not found at /data/user/0/com.websarva.wings.android.ocr_sample2/files/tessdata/eng.traineddata

というエラーがでます
app/assets/tessdata/eng.traineddata
に言語データをおいています

どこをどう改善すればエラーがなくなるでしょうか

エラーメッセージ

D/tag: msg
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.websarva.wings.android.ocr_sample2, PID: 4879
    java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/image:109 flg=0x43 }} to activity {com.websarva.wings.android.ocr_sample2/com.websarva.wings.android.ocr_sample2.MainActivity}: java.lang.IllegalArgumentException: Data file not found at /data/user/0/com.websarva.wings.android.ocr_sample2/files/tessdata/eng.traineddata
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4360)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:4402)
        at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.IllegalArgumentException: Data file not found at /data/user/0/com.websarva.wings.android.ocr_sample2/files/tessdata/eng.traineddata
        at com.googlecode.tesseract.android.TessBaseAPI.init(TessBaseAPI.java:339)
        at com.googlecode.tesseract.android.TessBaseAPI.init(TessBaseAPI.java:303)
        at com.websarva.wings.android.ocr_sample2.OCR_act.getString(OCR_act.kt:67)
        at com.websarva.wings.android.ocr_sample2.MainActivity.onActivityResult(MainActivity.kt:88)
        at android.app.Activity.dispatchActivityResult(Activity.java:7454)
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4353)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:4402) 
        at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:193) 
        at android.app.ActivityThread.main(ActivityThread.java:6669) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

###ソースコード

kotlin
1                  ...
2                    bitmap?.let {
3                        image.setImageBitmap(it)
4                        val langId = radio_group.getCheckedRadioButtonId()
5                        val langText = findViewById<RadioButton>(langId).text.toString()
6                        Log.d("tag","msg")
7                        ocr.text = ocract.getString(applicationContext, it, OCR_act.Companion.LangType.getLangType(langText).str)            
8                        Log.d("tag1","msg")
9                    } ?: run {
10                        ocr.text = "bitmap is null"
11
12                    }