Good afternoon and thank you for posting in the Final Fantasy XIV Technical Support Forums.

Does this crash only happen during the duty described above? Do you experience this crash anywhere else in game? What have you tried to so far to alleviate the issue? Also could you provide a system report? Simply go to the 'Config' option on the Final Fantasy XIV launcher and to the right of 'System Information' click on 'Display.'
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Hope to see you online!