Someone mentioned previously that the tickets came from Tourico (or something like that if I remember right) who was either a supplier or sister company to LMTClub. I searched for Tourico’s website back then to see who they were and it redirected to another URL like the company was being rebranded, restructured or something like that. This could be a plausible explanation for each of the different answers they are giving people: out of stock, unavailable, systems not talking to each other, not being authorized to sell anymore, etc..
Hopefully, if that is the case tickets will become available again once all of those changes behind the scenes are completed.