problem on installation

[AndreaMiotto]

Downloading dependencies
-> Installing Flutter (1.0.0)
-> Installing vibrate (0.0.1)
- Running pre install hooks
[!] Unable to determine Swift version for the following pods:
- vibrate does not specify a Swift version and none of the targets (Runner) integrating it have the SWIFT_VERSION attribute set. Please contact the author or set the SWIFT_VERSION attribute in at least one of the targets that integrate this pod.
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.0/lib/cocoapods/installer/xcode/target_validator.rb:115:in verify_swift_pods_swift_version' /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.0/lib/cocoapods/installer/xcode/target_validator.rb:37:in validate!'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.0/lib/cocoapods/installer.rb:459:in validate_targets' /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.0/lib/cocoapods/installer.rb:138:in install!'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.0/lib/cocoapods/command/install.rb:48:in run' /Library/Ruby/Gems/2.3.0/gems/claide-1.0.2/lib/claide/command.rb:334:in run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.0/lib/cocoapods/command.rb:52:in run' /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.6.0/bin/pod:55:in <top (required)>'
/usr/local/bin/pod:22:in load' /usr/local/bin/pod:22:in

'
Error running pod install
Exited (sigterm)

[AndreaMiotto]

It was a project configuration problem.
It was not supporting swift.
I've delete android and ios folder, than i've used the command:

flutter create -i swift -a kotlin projectName

And now it works.