1. Two possible causes for the error here; one, a simple omission, a slip of the pen, perhaps, because the writer paused in the middle of the word. BNC
2. There is sometimes more than one reason for an error, though: always find out if an error is a real mistake that needs your attention, or simply a slip of the pen that the writer would correct on re-reading. BNC
3. But it seems likely that this is a slip of the pen and that he means the Muftilik inasmuch as he says that Molla Fenari went on the pilgrimage in 822/1419 before he became Mufti, an appointment he has not otherwise mentioned. BNC