A 27-year-old male is involved in a motor vehicle collision and presents to the ER with the right lower extremity injury shown in Figures A and B. He undergoes immediate closed reduction and the post-reduction CT is shown in Figures C and D. The patient undergoes percutaneous surgical screw fixation of the injury. At 2 years follow-up, he presents with a supination deformity with decreased eversion of the foot at rest. Radiographs reveal no evidence of talus subchondral sclerosis or collapse. Which of the following is the most likely cause of the finding in this patient?