@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_log_in);
    mLoginBtnLogin = findViewById(R.id.login_btn_login);
    mLoginRecoverPassword = findViewById(R.id.login_recover_password);
    mLoginBtnRegister = findViewById(R.id.login_btn_register);
    mLoginField1 = findViewById(R.id.login_field_1);
    mLoginField2 = findViewById(R.id.login_field_2);
    mLoader = new KProgressHUD(this);

    mLoginRecoverPassword.setOnClickListener(v -> {
        Intent RecoverPassword = new Intent(LogIn.this, RecoverPassword.class);
        LogIn.this.startActivity(RecoverPassword);
    });

    String mOptionsLogIn = getIntent().getStringExtra("login_info");
    if (mOptionsLogIn != null){
        switch (mOptionsLogIn){
            case "mail_verification_success":
                Snacky.builder()
                        .setBackgroundColor(Color.parseColor("#ff4e5e"))
                        .setActivity(LogIn.this)
                        .setText(getString(R.string.login_snack_message_mail_verification))
                        .setDuration(Snacky.LENGTH_SHORT)
                        .error()
                        .show();
                break;
            case "user_ban":
                mUsersDB.child(mCurrentUser.getUid()).addListenerForSingleValueEvent(new ValueEventListener() {
                    @Override
                    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                        String mBanReason = dataSnapshot.child("reason_suspension").getValue().toString();
                        new FancyAlertDialog.Builder(LogIn.this)
                                .setIcon(R.drawable.ic_error_notifications, Icon.Visible)
                                .setTitle(getString(R.string.wolfnginx_alert_default_title_error_funny))
                                .setMessage(getString(R.string.wolfnginx_alert_default_title_error_suspension_1) + "nn" +
                                        getString(R.string.wolfnginx_alert_default_title_error_suspension_2) + "n" +
                                        mBanReason + "nn" +
                                        getString(R.string.wolfnginx_alert_default_message_error_3) + "n" +
                                        getString(R.string.wolfnginx_alert_default_contact_email))
                                .setAnimation(Animation.SLIDE)
                                .setBackgroundColor(Color.parseColor("#ff4e5e"))
                                .setPositiveBtnBackground(Color.parseColor("#ff4e5e"))
                                .setNegativeBtnText(getString(R.string.wolfnginx_alert_default_btn_cancel))
                                .setPositiveBtnText(getString(R.string.wolfnginx_alert_default_btn_contact))
                                .isCancellable(true)
                                .OnPositiveClicked(() -> {
                                    mLoader.dismiss();
                                    FirebaseAuth.getInstance().signOut();
                                }).OnNegativeClicked(() -> {
                                    mLoader.dismiss();
                                    FirebaseAuth.getInstance().signOut();
                                }).build();
                    }

                    @Override
                    public void onCancelled(@NonNull DatabaseError databaseError) {
                        Snacky.builder()
                                .setBackgroundColor(Color.parseColor("#ff4e5e"))
                                .setActivity(LogIn.this)
                                .setText(getString(R.string.wolfnginx_snack_error_default_message_data_cancel) + " " + databaseError.getMessage())
                                .setDuration(Snacky.LENGTH_INDEFINITE)
                                .setActionText(android.R.string.ok)
                                .error()
                                .show();
                    }
                });
                break;
        }
    }

    mAuth = FirebaseAuth.getInstance();
    mCurrentUser = mAuth.getCurrentUser();
    mUsersDB = FirebaseDatabase.getInstance().getReference().child("Users");
    mBansDB = FirebaseDatabase.getInstance().getReference().child("Bans");

    mLoginBtnRegister.setOnClickListener(v -> {
        Intent Register = new Intent(LogIn.this, Register.class);
        LogIn.this.startActivity(Register);
    });

    mLoginBtnLogin.setOnClickListener(v -> {
        if (!mLoginField1.getText().toString().isEmpty() && !mLoginField2.getText().toString().isEmpty()) {
            mLoader.setLabel(LogIn.this.getString(R.string.wolfnginx_loading_default_title));
            mLoader.setDetailsLabel(LogIn.this.getString(R.string.wolfnginx_loading_default_message));
            mLoader.setAnimationSpeed(1);
            mLoader.setDimAmount(0.5f);
            mLoader.setCancellable(false);
            mLoader.show();
            LogIn.this.loginUserWolfNginx(mLoginField1.getText().toString(), mLoginField2.getText().toString());
        } else {
            Snacky.builder()
                    .setBackgroundColor(Color.parseColor("#ff4e5e"))
                    .setActivity(LogIn.this)
                    .setText(LogIn.this.getString(R.string.wolfnginx_snack_default_message_empty_fields))
                    .setDuration(Snacky.LENGTH_INDEFINITE)
                    .setActionText(android.R.string.ok)
                    .error()
                    .show();
        }
    });
}

2019-02-18 21:31:23.404 13005-13005/network.wolfnginx.okami E/TypefaceCompatApi21Impl: java.lang.NoSuchMethodException
    java.lang.NoSuchMethodException: addFontWeightStyle [class java.lang.String, int, boolean]
        at java.lang.Class.getMethod(Class.java:2068)
        at java.lang.Class.getMethod(Class.java:1690)
        at androidx.core.graphics.TypefaceCompatApi21Impl.<clinit>(TypefaceCompatApi21Impl.java:74)
        at androidx.core.graphics.TypefaceCompat.<clinit>(TypefaceCompat.java:49)
        at androidx.core.graphics.TypefaceCompat.create(TypefaceCompat.java:190)
        at androidx.appcompat.widget.AppCompatTextView.setTypeface(AppCompatTextView.java:576)
        at androidx.appcompat.widget.AppCompatTextHelper.loadFromAttributes(AppCompatTextHelper.java:217)
        at androidx.appcompat.widget.AppCompatTextView.<init>(AppCompatTextView.java:103)
        at androidx.appcompat.widget.AppCompatTextView.<init>(AppCompatTextView.java:93)
        at androidx.appcompat.app.AppCompatViewInflater.createTextView(AppCompatViewInflater.java:182)
        at androidx.appcompat.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:103)
        at androidx.appcompat.app.AppCompatDelegateImpl.createView(AppCompatDelegateImpl.java:1267)
        at androidx.appcompat.app.AppCompatDelegateImpl.onCreateView(AppCompatDelegateImpl.java:1317)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:776)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:867)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:870)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:519)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:470)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:141)
        at network.wolfnginx.okami.main.LogIn.onCreate(LogIn.java:45)
        at android.app.Activity.performCreate(Activity.java:7084)
        at android.app.Activity.performCreate(Activity.java:7075)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1215)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2767)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1613)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:176)
        at android.app.ActivityThread.main(ActivityThread.java:6635)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)