title: Exiting because upload-symbols was run in validation mode
body: <p>Im trying to add Fabric to my xcode project. I've done so succesfully in the past but now facing issues with a react-native project. Having looked around, i've tried pretty much all combinations suggested out there. My setup looks like so:</p>
  <p><a href="https://i.stack.imgur.com/FbpOc.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FbpOc.png" alt="enter image description here" /></a></p>
  <p>I've also tried the Pods version using &quot;${PODS_ROOT}/Fabric/run&quot;  however no matter what i do im unable to proceed from the Add Run Script step.</p>
  <p>In attempt to try and debug i've directed the output of what the Fabric command produces to a file. It yields the following:</p>
  <blockquote>
  <p>Running upload-symbols in Build Phase mode Validating build
  environment for Crashlytics... Validation succeeded. Exiting because
  upload-symbols was run in validation mode</p>
  </blockquote>
  <p>Any help much appreciated. Im very unsure as to how to take it from here</p>
  <p><strong>ADDITIONAL_INFO</strong>:</p>
  <p>I've reinstalled the Fabric Mac app from scratch, restarted both xcode,fabric app and the whole system in general. Tried building in release mode and have pretty much tried everything here:</p>
  <p><a href="https://stackoverflow.com/questions/28117477/crashlytics-in-ios-wont-proceed-past-build-your-project-in-fabric-app">Crashlytics in iOS won&#39;t proceed past &quot;Build Your Project&quot; in Fabric app</a></p>