Exactly what are you trying to do? Are you trying to program a module, if yes then you need an active subscription to get data files from Autel server. Is this happening to all makes and models and is this happening just going into to look for codes? Even if your subscription is expired you should still be able to use it with your existing software except ECU programming that requires Autel Data servers for ECU files. If your subscription is still active, I would suggest a factory reset and erase SD card then reload all the software from system update, If you already expired, then do not factory reset it because you will not have any software to download.
Did you try connecting to vehicle with the usb cable hooked up between J2534 and scanner, sometimes the bluetooth gets interference and is a little slower.