That error is normally that you're using a feature that's not available under the licence you're using. However, looking at the subscription matrix that looks to be a basic feature, so it could be that the error is a red herring and another feature is not covered under your licence.
Have you raised a standard support ticket or GitHub issue at all?
Sorry to hear that Thiago. I've seen an update today that this issue is caused by Fleet making use of a ES platinum feature under the covers. The GitHub issue is here for you to track and looks to be being picked up.
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