javax.xml.parsers.ParserConfigurationException: http://apache.org/xml/features/nonvalidating/load-dtd-grammar

[anton0801]

Hello

I am making an app for reading EPUB books. when i want to call reader.setFullContent(file.absolutePath) method gives me the following error:

javax.xml.parsers.ParserConfigurationException: http://apache.org/xml/features/nonvalidating/load-dtd-grammar W/System.err: at org.apache.harmony.xml.parsers.DocumentBuilderFactoryImpl.setFeature(DocumentBuilderFactoryImpl.java:101) at com.github.mertakdut.Reader.fillContent(Reader.java:322) at com.github.mertakdut.Reader.setFullContentWithProgress(Reader.java:65) at ru.fillipok.reader.ui.fragments.show.ShowActivity.onCreate(ShowActivity.kt:171) at android.app.Activity.performCreate(Activity.java:8086) at android.app.Activity.performCreate(Activity.java:8074) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1313) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3755) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3961) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2386) at android.os.Handler.dispatchMessage(Handler.java:107) W/System.err: at android.os.Looper.loop(Looper.java:213) at android.app.ActivityThread.main(ActivityThread.java:8178) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)

Can you please tell me what to do!