the target "MediaWatermark" contains source code developed with Swift 2.x. Xcode 9 does not support building or migrating Swift 2.x targets

[roycclu]

Hello,

Your documentation says the minimum requirement is Swift 4.0 and iOS 9.0+
But I added MediaWatermark as a pod dependency like so

  platform :ios, '9.0'

target 'createScene' do
  # Pods for createScene
     pod "AKPickerView"
     pod 'MediaWatermark', '~> 0.2'
end

And it returns an error upon opening the xcworkspace saying "the target "MediaWatermark" contains source code developed with Swift 2.x. Xcode 9 does not support building or migrating Swift 2.x targets"

Any idea what's the problem? Thanks.