Can you provide more information? What device are you using? Do you see any errors in the logs?
I was using a Clover Mini DevKit but I realized that maybe it was because the Sandbox Merchant linked to the device its in Payment Plus Bundle and I suppose that Order Inspoector request "Orders" data which is limited on this bundle. Please correct me if I am wrong.
https://community.clover.com/questions/35/how-do-i-ask-a-good-question.html. See points (8) and (9).
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