I’ve added the fast lane step to my workflow and I’m using the upload_symbols_to_crashlytics flow as suggested in your blog post. Unfortunately the Fabric.app isn’t available so the binary for upload-symbols can’t be found? Any ideas how to install it or get around this?
This seems to be a fastlane issue, I’d suggest you to ask this on their issue tracker: https://github.com/fastlane/fastlane
I think you have to integrate Fabric with your project, but the fastlane guys can definitely help 