Hi there,
I have a Aero Supersport which I expect uses the same module and have suffered the same problem. The car was with the Morgan specialist and it seems the manufacturer of the module has gone bust and it is likely to cost over £2k to have it sorted and replaced with another manufacturer! So, back to locking it the old fashioned way with the key!
best regards
Peter
Or do as I do on the Aero plus 8.... never bother to lock it.

I guess that is the easier solution lol.
If it was an old classic car then I don't mind. However, this car was delivered new with a properly working central door locking mechanism. It now likely has a faulty module that can be easily replaced if my alarm system installer knows where the module is located.