App crash on iOS

[Gursewak-Uppal]

Xcode build done.                                           108.5s
Installing and launching...
(lldb) dyld[7502]: Symbol not found: _OBJC_CLASS_$_Reachability
  Referenced from: /private/var/containers/Bundle/Application/712DD2C5-3A2E-4FE1-9EA6-11052C59C96F/Runner.app/Frameworks/connectivity.framework/connectivity
  Expected in: /private/var/containers/Bundle/Application/712DD2C5-3A2E-4FE1-9EA6-11052C59C96F/Runner.app/Frameworks/Reachability.framework/Reachability
* thread #1, stop reason = signal SIGABRT
    frame #0: 0x0000000103938578 dyld`__abort_with_payload + 8
dyld`__abort_with_payload:
->  0x103938578 <+8>:  b.lo   0x103938598               ; <+40>
    0x10393857c <+12>: pacibsp 
    0x103938580 <+16>: stp    x29, x30, [sp, #-0x10]!
    0x103938584 <+20>: mov    x29, sp
Target 0: (Runner) stopped.

[hsbijarniya]

You need to create new flutter project.

flutter create com.example

Then use code provided in "example/lib/main.dart"

[Gursewak-Uppal]

Why is it not possible in the current (existing) project?