Igor, looks like you maybe in need of an updated License file from AppD. Are you able to open a Support ticket (thru email@example.com) and the AppD Licensing team should be able to help provide a new copy of the license file.
The link you provided mainly pertains to the scenario where you have an On-Premise Controller with multiple accounts / tenants in a single deployment. Not sure if that is what you have...Either ways, since this is licensing related, it maybe better for you to open a Support ticket..Thanks
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