Cannot work on Android

[SteveWorkshop]

Here is the log;

FATAL EXCEPTION: pool-3-thread-1 (Ask Gemini)
                                                                                                    Process: io.github.materialapps.texteditor, PID: 18230
                                                                                                    java.lang.NoClassDefFoundError: Failed resolution of: Lorg/markdown4j/Markdown4jProcessor;
                                                                                                    	at com.qkyrie.markdown2pdf.internal.converting.Markdown2HtmlConverter.convert(Markdown2HtmlConverter.java:19)
                                                                                                    	at com.qkyrie.markdown2pdf.Markdown2PdfConverter.doIt(Markdown2PdfConverter.java:49)
                                                                                                    	at io.github.materialapps.texteditor.logic.converter.PDFConverter.doConvert(PDFConverter.java:57)
                                                                                                    	at io.github.materialapps.texteditor.ui.fragment.EditorFragment.lambda$exportPDF$12$io-github-materialapps-texteditor-ui-fragment-EditorFragment(EditorFragment.java:587)
                                                                                                    	at io.github.materialapps.texteditor.ui.fragment.EditorFragment$$ExternalSyntheticLambda20.run(D8$$SyntheticClass:0)
                                                                                                    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
                                                                                                    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
                                                                                                    	at java.lang.Thread.run(Thread.java:1012)
                                                                                                    Caused by: java.lang.ClassNotFoundException: Didn't find class "org.markdown4j.Markdown4jProcessor" on path: DexPathList[[dex file "/data/data/io.github.materialapps.texteditor/code_cache/.overlay/base.apk/classes3.dex", zip file "/data/app/~~bSJjE-34WVYT57bYIeH66Q==/io.github.materialapps.texteditor-Z9eAmjsUyJehdflIk1IVDA==/base.apk"],nativeLibraryDirectories=[/data/app/~~bSJjE-34WVYT57bYIeH66Q==/io.github.materialapps.texteditor-Z9eAmjsUyJehdflIk1IVDA==/lib/arm64, /system/lib64, /system_ext/lib64]]
                                                                                                    	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:259)
                                                                                                    	at java.lang.ClassLoader.loadClass(ClassLoader.java:637)
                                                                                                    	at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
                                                                                                    	at com.qkyrie.markdown2pdf.internal.converting.Markdown2HtmlConverter.convert(Markdown2HtmlConverter.java:19) 
                                                                                                    	at com.qkyrie.markdown2pdf.Markdown2PdfConverter.doIt(Markdown2PdfConverter.java:49) 
                                                                                                    	at io.github.materialapps.texteditor.logic.converter.PDFConverter.doConvert(PDFConverter.java:57) 
                                                                                                    	at io.github.materialapps.texteditor.ui.fragment.EditorFragment.lambda$exportPDF$12$io-github-materialapps-texteditor-ui-fragment-EditorFragment(EditorFragment.java:587) 
                                                                                                    	at io.github.materialapps.texteditor.ui.fragment.EditorFragment$$ExternalSyntheticLambda20.run(D8$$SyntheticClass:0) 
                                                                                                    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
                                                                                                    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644) 
                                                                                                    	at java.lang.Thread.run(Thread.java:1012) 

[SteveWorkshop]

I just import the Jar into my android project

[SteveWorkshop]

This is how I use it:

package io.github.materialapps.texteditor.logic.converter;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;

import com.qkyrie.markdown2pdf.Markdown2PdfConverter;
import com.qkyrie.markdown2pdf.internal.exceptions.ConversionException;
import com.qkyrie.markdown2pdf.internal.exceptions.Markdown2PdfLogicException;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;

import io.github.materialapps.texteditor.BaseApplication;
import lombok.Getter;
import lombok.Setter;

public class PDFConverter {
    private static final String TAG = "PDFConverter";

    @Getter
    @Setter
    private Callback callback;

    private Markdown2PdfConverter markdown2PdfConverter =
            Markdown2PdfConverter.newConverter();

    public void doConvert(String text,String fileName){
        markdown2PdfConverter.readFrom(()->text);
        markdown2PdfConverter.writeTo(out -> {
            //do something with it here
            ContentValues contentValues=new ContentValues();
            contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME,fileName);
            contentValues.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DOWNLOADS);
            ContentResolver contentResolver = BaseApplication.getApplication().getContentResolver();
            Uri uri = contentResolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, contentValues);
            if(uri!=null)
            {
                try{
                    OutputStream outputStream = contentResolver.openOutputStream(uri);
                    outputStream.write(out);
                    outputStream.flush();
                    outputStream.close();
                    callback.onSuccess();
                } catch (IOException e) {
                    Log.e(TAG, "doConvert: ", e);
                    callback.onFailure();
                }
            }
        });
        try {
            markdown2PdfConverter.doIt();
        } catch (Exception e){
            Log.e(TAG, "doConvert: ", e);
            callback.onFailure();
        }
    }

    public interface Callback{
        void onSuccess();
        void onFailure();
    }
}