Problem with json -v '2.0.3' about fastlane-plugin-slack_train

[KrauseFx]

How did you install fastlane? Can you share your Gemfile?

[Lukaz32]

I believe it was via sudo gem install fastlane -NV

This is my Gemfile

# Autogenerated by fastlane
#
# Ensure this file is checked in to source control!

source "https://rubygems.org"

gem 'fastlane'

plugins_path = File.join(File.dirname(__FILE__), 'fastlane', 'Pluginfile')
eval_gemfile(plugins_path) if File.exist?(plugins_path)
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"Gemfile" 10L, 261C

[KrauseFx]

can you run sudo gem uninstall fastlane, and then run bundle install?

[Lukaz32]

That did it! Thanks man :)