Your last completion is marked as starting from a checkpoint on dungeon.report. Solo flawless can only be unlocked by completing the dungeon in one continuous run.
Hey there! Your last run has one death. That does not qualify you for a solo flawless triumph. And also since you got error coded, that also disqualified you for the triumph. You will need to rerun it again if you want to get the triumph. Good luck! 😃