(#2654) The specified engagement rule is invalid

[qingchengnus]

The error I got from console is:
FacebookAds::ClientError: (#2654) The specified engagement rule is invalid: Invalid subrule, subrule should be a json object: (fbtrace_id: C8drVEH1UbS)

Code is:

ca = ad_acc.customaudiences.create({
                                             name: "#{Rails.env}-PECA-#{tuition_center.id}",
                                             subtype: 'ENGAGEMENT',
                                             description: "#{tuition_center.name}'s page engagement custom audiences.",
                                             rule: {
                                                 object_id: tuition_center.facebook_ad_page_id,
                                                 event_name: "page_engaged"
                                             }.to_json
                                         })

[stale]

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Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please feel free to create a new issue with up-to-date information.