Hi there, we here @ Chinese player community wish to report a bug: we can't seem to complete this mission Preparation for the end times '准备时间尽头 ' despite having all requirements meet. Its a well-known bug in Chinese forums but I don't see it being reported in other languages. Please take a look if the text translation is incorrect and/or there is a bug with the mission quest in Chinese localisation
Attached are screenshots and a save-file with the said issue.
Edit: I've included English text for the mission name.