unable to launch on iOS

[manujbahl]

Below is the output from flutter run

$ flutter run
Launching lib/main.dart on iPhone X in debug mode...
Running pod install... 0.7s
CocoaPods' output:
↳
Generated.xcconfig must exist. If you're running pod install manually, make sure flutter build or flutter run is executed once first.
Preparing

Analyzing dependencies

Inspecting targets to integrate
  Using `ARCHS` setting to build architectures of target `Pods-Runner`: (`arm64`)

Finding Podfile changes
  R Flutter
  M flutter_facebook_login

Fetching external sources
-> Fetching podspec for `flutter_facebook_login` from `/Users/MBahl/flutter/projects/flutter_facebook_login-master/ios`

Resolving dependencies of `Podfile`
[!] Unable to find a specification for `Flutter` depended upon by `flutter_facebook_login`

/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:381:in `find_cached_set'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:351:in `specifications_for_dependency'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:156:in `search_for'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:267:in `block in sort_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:260:in `each'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:260:in `sort_by'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:260:in `sort_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/delegates/specification_provider.rb:53:in `block in sort_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/delegates/specification_provider.rb:70:in `with_no_such_dependency_error_handling'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/delegates/specification_provider.rb:52:in `sort_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/resolution.rb:754:in `push_state_for_requirements'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/resolution.rb:746:in `require_nested_dependencies_for'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/resolution.rb:729:in `activate_new_spec'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/resolution.rb:686:in `attempt_to_activate'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/resolution.rb:254:in `process_topmost_state'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/resolution.rb:182:in `resolve'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/molinillo-0.6.4/lib/molinillo/resolver.rb:43:in `resolve'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/resolver.rb:110:in `resolve'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:770:in `block in resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:64:in `section'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:767:in `resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:85:in `analyze'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:243:in `analyze'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:154:in `block in resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:64:in `section'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:153:in `resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:116:in `install!'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/command/install.rb:41:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/command.rb:52:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/bin/pod:55:in `<top (required)>'
/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod:22:in `load'
/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod:22:in `<main>'

Error output from CocoaPods:
↳

[!] Automatically assigning platform `ios` with version `8.0` on target `Runner` because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.

Error running pod install
Error launching application on iPhone X.

[roughike]

A case of "works on my machine".

Couple things:

• this project uses the Gradle 4.1 plugin and Android Studio 3.0 setup. When did you create your project? Have you migrated into the new project template?
• which version of flutter_facebook_login are you using? 1.0.0 didn't work with iOS at all.
• which version of Flutter are you using? (run flutter --version in terminal)
• does it work with a completely fresh new project on your machine?

[manujbahl]

FIXED ... Thanks.
everything was good except that my flutter was an older version. Upgrading flutter to the latest fixed the issue.

[roughike]

Awesome!