Thank you.
Unfortunately you have one of the first TRB145 versions ever made, so the validation doesn't work since this code does not exist any more.
We are working on a solution for cases such as this and I'll inform as soon as it gets resolved. Meanwhile, it would really help if you could tell me where you bought the device (directly from Teltonika or other seller) and the device's modem version (can also be checked in Status → System).