android – I’m with this Error in my code: Exception caught by gestures library Cannot hit test a render box with no size

Exception caught by rendering library
RenderBox was not laid out: RenderSemanticsGestureHandler#5a90d relayoutBoundary=up8 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
‘package:flutter/src/rendering/box.dart’:
Failed assertion: line 1972 pos 12: ‘hasSize’
The relevant error-causing widget was:

Exception caught by gestures library
Cannot hit test a render box with no size.

double deviceHeight = MediaQuery.of(context).size.height;

return Scaffold(
  backgroundColor: const Color(0xFF101d25),
  body: Center(
    child: Container(
      height: deviceHeight,
      color: const Color(0xFF101d25),
      child: Column(
        children: [
          const Padding(
            padding: EdgeInsets.only(top: 110),
            child: Text(
              'Welcome to WhatsApp',
              style: TextStyle(
                fontSize: 35,
                color: Colors.white,
                fontWeight: FontWeight.bold,
              ),
              textAlign: TextAlign.center,
            ),
          ),
          Padding(
            padding: const EdgeInsets.only(top: 70, bottom: 70),
            child: Expanded(
              child: SizedBox(
                child: Image.asset(
                  'images/image_whatsapp.jpg',
                  height: 260,
                  width: 260,
                ),
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 22),
            child: RichText(
              textAlign: TextAlign.center,
              text: TextSpan(children: [
                const TextSpan(
                    text: 'Read our ',
                    style: TextStyle(color: Colors.white, fontSize: 16)),
                TextSpan(
                    text: 'Privicy Police',
                    style:
                        const TextStyle(color: Colors.blue, fontSize: 16),
                    recognizer: TapGestureRecognizer()
                      ..onTap = () {
                        // print('CLICK TAP ');
                        showDialog(
                            context: context,
                            builder: (BuildContext context) {
                              return AlertDialog(
                                title: const Text('Privicy Police'),
                                content: const Text(
                                    'This is a test to show a Alert dialog...'),
                                actions: <Widget>[
                                  TextButton(
                                    child: const Text('Agree'),
                                    onPressed: () {
                                      Navigator.of(context).pop();
                                    },
                                  ),
                                  TextButton(
                                    child: const Text('Disagree'),
                                    onPressed: () {
                                      Navigator.of(context).pop();
                                    },
                                  )
                                ],
                              );
                            });
                      }),
                const TextSpan(
                  text: ' Tap "Agree and continue" to accept the ',
                  style: TextStyle(color: Colors.white, fontSize: 16),
                ),
                TextSpan(
                    text: 'Terms of Service',
                    style:
                        const TextStyle(color: Colors.blue, fontSize: 16),
                    recognizer: TapGestureRecognizer()
                      ..onTap = () {
                        //print('CLICK AGREE');
                        showDialog(
                            context: context,
                            builder: (BuildContext context) {
                              return AlertDialog(
                                title: const Text('Terms of Service'),
                                content: const Text(
                                    'This is a test to show a Alert dialog...'),
                                actions: <Widget>[
                                  TextButton(
                                    child: const Text('Agree'),
                                    onPressed: () {
                                      Navigator.of(context).pop();
                                    },
                                  ),
                                  TextButton(
                                    child: const Text('Disagree'),
                                    onPressed: () {
                                      Navigator.of(context).pop();
                                    },
                                  )
                                ],
                              );
                            });
                      }),
                const TextSpan(
                  text: '.',
                  style: TextStyle(color: Colors.white, fontSize: 16),
                ),
              ]),
            ),
          ),
          const SizedBox(height: 20),
          SizedBox(
            height: 50,
            width: 480,
            child: Padding(
              padding: const EdgeInsets.symmetric(horizontal: 50),
              child: ElevatedButton(
                  onPressed: () {
                    _dialogBuilder(context);
                    //('AGREE AND CONTINUE');
                  },
                  style: ElevatedButton.styleFrom(
                      shape: BeveledRectangleBorder(
                          borderRadius: BorderRadius.circular(2)),
                      backgroundColor: const Color(0xFF0ca886)),
                  child: const Padding(
                    padding: EdgeInsets.symmetric(vertical: 12),
                    child: Text(
                      'AGREE AND CONTINUE',
                      style: TextStyle(
                          color: Color(0xFF121a21), fontSize: 16),
                    ),
                  )),
            ),
          ),
          const Expanded(
            child: SizedBox(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.end,
                children: [
                  Text(
                    "From",
                    style: TextStyle(color: Colors.white),
                    textAlign: TextAlign.center,
                  ),
                  Text("FACEBOOK",
                      style: TextStyle(
                        letterSpacing: 3,
                        color: Colors.white,
                        fontWeight: FontWeight.bold,
                        fontSize: 16,
                      ),
                      textAlign: TextAlign.center)
                ],
              ),
            ),
          ),
        ],
      ),
    ),
  ),
);

}