Cannot set License key for SciChart in AndroidStudio

package com.example.my5;

import android.os.Bundle;

import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
...

import com.scichart.charting.visuals.SciChartSurface;
import com.scichart.charting.visuals.axes.IAxis;

...

public class MainActivity extends AppCompatActivity {

    private AppBarConfiguration mAppBarConfiguration;


    String license = ("<LicenseContract>\n" +
            "  <Customer>nnuni@mail.ru</Customer>\n" +
            "  <OrderId>Trial</OrderId>\n" +
            "  <LicenseCount>1</LicenseCount>\n" +
            "  <IsTrialLicense>true</IsTrialLicense>\n" +
            "  <SupportExpires>12/31/2019 00:00:00</SupportExpires>\n" +
            "  <ProductCode>SC-ANDROID-2D-ENTERPRISE-SRC</ProductCode>\n" +
            "  <KeyCode>28a24cba44.........8a6c</KeyCode>\n" +
            "</LicenseContract>");
// Use Static method SciChartSurface.setRuntimeLicenseKey()
SciChartSurface.setRuntimeLicenseKey(license);





    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow,
                R.id.nav_tools, R.id.nav_share, R.id.nav_send)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }
}