Error 2: The code entered has already been used.

[Bishoujo_Senshi-Saila_Pea_Nass]

I am also getting this error message, and I purchased my game directly from the square enix store online on July 15th. It looks like I may not get into early access, which is upsetting since I pre-ordered for the sole reason of getting into early access.

[Colossal]

I also pre-ordered from the official Square website July 15 and I am also getting error 2. After spamming it for a while, it started giving me error 3 instead of error 2 but now it is back to error 2 again.