My Android app crashes after button is clicked

Question

I'm trying to make a program that does a calculation from data entered in the first fragment, then sends and displays the calculated values in the second fragment. When I press the button in my app, the app crashes.

OnClick in the first fragment:

public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        view.findViewById(R.id.ButIzracun).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ArrayList<ValAtt> mValAtts=new ArrayList<>();
                Baza baz=new Baza();
                mValAtts=baz.getVA();
                double fibLoss, fibLen, lossBud;
                s=(Spinner) s.findViewById(R.id.tip);
                brSplice=(EditText) brSplice.findViewById(R.id.brSpoj);
                brCon=(EditText) brCon.findViewById(R.id.brKon);
                cLen=(EditText) cLen.findViewById(R.id.duzKabel);
                minPow=(EditText) minPow.findViewById(R.id.minPow);
                recPow=(EditText) recPow.findViewById(R.id.recPow);

                double sFAtt=mValAtts.get(s.getSelectedItemPosition()).getmAtt();
                fibLoss = kons.getsLoss()*Double.parseDouble(brSplice.getText().toString())+kons.getcLoss()*Double.parseDouble(brCon.getText().toString())+Double.parseDouble(cLen.getText().toString())*sFAtt+ kons.getsMarg();
                fibLen = (Double.parseDouble(minPow.getText().toString())-Double.parseDouble(recPow.getText().toString())-kons.getsLoss()*Double.parseDouble(brSplice.getText().toString())-kons.getcLoss()*Double.parseDouble(brCon.getText().toString()))/sFAtt;
                lossBud = fibLoss+Double.parseDouble(minPow.getText().toString())-Double.parseDouble(recPow.getText().toString());
                NavHostFragment.findNavController(FirstFragment.this)
                        .navigate(R.id.action_FirstFragment_to_SecondFragment);

                double[] rez=new double[3];
                rez[0]=fibLoss; rez[1]=fibLen;rez[2]=lossBud;

                Bundle bundle = new Bundle();
                bundle.putDoubleArray("key",rez);

                SecondFragment fragment2 = new SecondFragment();
                fragment2.setArguments(bundle);


            }

        });
    }

OnCreateView in the second fragment:

    public View onCreateView(
            LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState
    ) {
        Bundle bundle = this.getArguments();
        assert bundle != null;
        rezultat=bundle.getDoubleArray("key");
        View v=inflater.inflate(R.layout.fragment_second,container,false);

        setTextR1(v);
        setTextR2(v);
        setTextR3(v);

        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_second, container, false);



    }

    @SuppressLint("SetTextI18n")
    public void setTextR1(View v) {
        r1 = (TextView) v.findViewById(R.id.textView6);
        r1.setText(Double.toString(rezultat[0]));
    }
    @SuppressLint("SetTextI18n")
    public void setTextR2(View v) {
        r2 = (TextView) v.findViewById(R.id.textView8);
        r2.setText(Double.toString(rezultat[1]));
    }
    @SuppressLint("SetTextI18n")
    public void setTextR3(View v) {
        r3 = (TextView) v.findViewById(R.id.textView10);
        r3.setText(Double.toString(rezultat[2]));
    }

Every class or variable is declared beforehand if it's not in the code that I copied. .

I wanted to send the data through the bundle, get the data in the second fragment, then display that data in the TextView.

Logcat:

2023-07-15 17:18:39.932 7336-7336/com.example.optickikalkulator E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.optickikalkulator, PID: 7336
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.widget.Spinner.findViewById(int)' on a null object reference
        at com.example.optickikalkulator.FirstFragment$2.onClick(FirstFragment.java:91)
        at android.view.View.performClick(View.java:7548)
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
        at android.view.View.performClickInternal(View.java:7525)
        at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
        at android.view.View$PerformClick.run(View.java:29562)
        at android.os.Handler.handleCallback(Handler.java:942)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loopOnce(Looper.java:210)
        at android.os.Looper.loop(Looper.java:299)
        at android.app.ActivityThread.main(ActivityThread.java:8252)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:559)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:954)