Night terrors dont usually hit til two or three, it sounds like developmental stage. Be careful not to let her train you to come in at midnight every night... it will be harder to break the cycle.
I have found with night terrors, a child that goes to bed over-tired is much more susceptible.
They are on a huge learning curve & thinking about sooo much at that age, they often "drop" a learned skill for a while to concentrate on another.
It might be that she is waking up thinking about getting to that new skill she wants to practice. Perhaps if you can figure out what it is, you can let her get to it before bed time.
There is probably no "solution", just patience. Non of these stages last very long. Hang in there.