That error message is consistent with:
The currently logged in employee not having the permission Delete Open Orders (in Employees app -> Permissions Tab -> Register group -> Delete Open Orders).
Other potential causes of that error message include:
No employee logged in to device at time of execution
Device has never synced permissions w/ server
Device was not configured correctly
I'd need the device logcat to investigate further. I was unable to find the order or employee from the error message. Are you sure the device is configured correctly and has internet?
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