title: xcrun xcodebuild ** EXPORT FAILED ** after installing Xcode9
body: <p>After installing Xcode9, <code>xcrun xcodebuild -exportArchive</code> started to <code>** EXPORT FAILED **</code>.</p>
  
  <blockquote>
    <p>xcodebuild[8520:2065474] [MT] IDEDistribution: Step failed:
    IDEDistributionSigningAssetsStep: 0x7fd93ba747d0: Error
    Domain=IDEDistributionSigningAssetStepErrorDomain Code=0 "Locating
    signing assets failed." UserInfo={NSLocalizedDescription=Locating
    signing assets failed.,
    IDEDistributionSigningAssetStepUnderlyingErrors=(
        "Error Domain=IDEProvisioningErrorDomain Code=9 \"\"MyApp_Today.appex\" requires a provisioning profile with the App
    Groups feature.</p>
  </blockquote>
  
  <p>The error <code>requires a provisioning profile with the App Groups feature.</code> is repeated multiple times.</p>
  
  <p>The provisions are present for each target in the project, but for some reason it's no longer enough. What is this "App Groups feature" and how do I make it work with <code>xcrun xcodebuild</code>?</p>
  
  <p>Thanks.</p>