I'm trying to connect to a Flex 3 terminal running on Emulator in Android Studio,
connected to the sandbox account.
I can download information about the list of devices but I cannot send e.g. a message to the device using the API: "https://sandbox.dev.clover.com/connect/v1/device/display"
{ "beep": true, "text": "Message to display to the customer"}
I get error 500 as below.
I haven't found any information on what it means. How should I interpret this message? How to solve the problem?
{ "message": "Could not verify authentication token with COS server.", "requestId": "655ec610-141712", "requestType": "DISPLAY_MESSAGE", "type": "ERROR" }