Reach Estimate does not work for Behavior Targeting

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#1

We are attempting to fetch a reach estimate for behaviors and behaviors_expanded. We receive the following error from the API when we submit a valid request.

Your request (GET https://ads-api-sandbox.twitter.com/0/accounts/gq0xxs/reach_estimate?similar_to_followers_of_users=19397785&placement_type=PROMOTED_TWEETS_FOR_TIMELINES&bid_amount_local_micro=10000000&currency=USD&user_id=3260199066&behaviors_expanded=lfzv) resulted in the following errors: NOT_FOUND: Behaviors or behaviors expanded lfzv was not found

Please advise!