can someone modify the Easy Installer to accept 0123456789… ?
I think I would ask in the Teracube forum if this is normal, there may be a way to adjust the device. Do you know if this was an “original install” or might the phone have some “history”?
Just a thought … if you boot into Recovery mode … often the important identifier, usually device codename, sometimes more is recorded here. What you find might help inform your question at Teracube, perhaps.
Strangely there is recent “hard to identify” Teracube Easy Installer failure here