CocoaPods not working in macOS High Sierra

According to https://github.com/CocoaPods/CocoaPods/issues/6778 reinstalling CocoaPods should solve this issue:

sudo gem install cocoapods

After upgrading to macOS High Sierra, get it fixed with following commands:

sudo gem update --system
sudo gem install -n /usr/local/bin cocoapods

once it will be finished then write below command:

pod install

This solution has worked for me...!!!

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