AbeAbayomi
Unfortunately, without any information about the tracker, what commands you are sending, etc., we cannot give any answer. Information about the error text alone is not enough.
In any case regarding the operation of the tracker, it is best for you to directly contact its manufacturer or seller. They are the ones who have the most complete expertise in this matter.
Please write to us at support@gps-trace.com with the login, unit ID, screenshot of device configuration (SMS commands and device’s answers)? describe your issue in more detail and link to this topic, then we will try to check additionally and help you.