Without going back and watching the free dance, I would guess that the following rules from the Ice Dancing Technical Panel Handbook apply:
""If a Fall or interruption occurs at the entrance to or during a Set of Twizzles and is immediately followed by other
Twizzles (for the purpose of filling time), the element shall be identified and given a Level according to the
requirements met before the Fall or interruption, or No Level if the requirements for Level 1 are not met, and
the additional part shall not be identified"
and
"If a loss of control with additional support (touch down by free leg/foot and/or hand(s)) occurs after a Twizzle has commence
d and the Twizzle continues after touchdown (without interruption), only the rotations before the touchdown shall be considered for Level."
So if they met the requirements for at least Level 1 before the error, they would get credit for whatever had been executed up to that point.