How can I create tabs in a Flutter dialog? - Stack Overflow

I have the following alert dialog. As you can see, it has two tabs.

I wish to remove the SizedBox and let it dynamically size according to content. Unfortunately, I always hit an intristic rendering error.

How can I implement it correctly? NestedScrollView and other alternatives that I have attempted caused the same error.

AlertDialog(
      title: Row(children: [
        const Text('Group'),
        const Spacer(),
        IconButton(
          icon: Icon(Icons.person),
          onPressed: () {
            setState(() {
              groupTab = false;
            });
          },
        )
      ]),
      content: SingleChildScrollView(
          child: Column(children: [
        TabBar(
          controller: _tabController,
          tabs: [
            Tab(text: 'Join'),
            Tab(text: 'Create'),
          ],
          onTap: (_) => setState(() {}),
        ),
        SizedBox(
          height: 300,
          width: 300,
          child: TabBarView(
            controller: _tabController,
            children: [
              Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  TextField(
                    decoration: const InputDecoration(
                      labelText: 'Group ID',
                    ),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      // Join group
                    },
                    child: const Text('Join'),
                  ),
                ],
              ),
              Column(
                children: [
                  TextField(
                    decoration: const InputDecoration(
                      labelText: 'Group Name',
                    ),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      // Create group
                    },
                    child: const Text('Create'),
                  ),
                ],
              ),
            ],
          ),
        )
      ])),
      actions: [
        TextButton(
          onPressed: () {
            Navigator.of(context).pop();
          },
          child: const Text('Cancel'),
        ),
        TextButton(
          onPressed: () {
            Navigator.of(context).pop();
          },
          child: _tabController.index == 0
              ? const Text('Join')
              : const Text('Create'),
        ),
      ],
    );