message: Fix error when config.analytics was undefined
  Changelog-entry: Fix error when config.analytics was undefined
  Change-type: patch
diff: @@ -71,11 +71,13 @@ function getConfig(url) {
  */
  // eslint-disable-next-line
  function getMixpanelConfig(config) {
  - const probability = config.analytics.mixpanel.probability || DEFAULT_PROBABILITY
  + const analytics = config.analytics || {}
  + const mixpanel = analytics.mixpanel || {}
  + const probability = mixpanel.probability || DEFAULT_PROBABILITY
  if (Math.random() > probability) {
  return null
  }
  - return validateMixpanelConfig(config.analytics.mixpanel)
  + return validateMixpanelConfig(mixpanel)
  }
  /**
  