Step 1: Identify the structure.
The sentence uses the correlative conjunction "neither...nor." The first clause "She neither apologized" is in the simple past tense.
Step 2: Apply the tense consistency rule.
In a neither/nor construction, both clauses must share the same tense. Since "apologized" is past tense, "nor does she" (present tense) creates a tense mismatch. It should be "nor did she."
Step 3: Confirm the answer.
The error is in Part 2. \[ \boxed{\text{her mistake, nor does she}} \]