[War-277802]

For the third time in a row, Warframe has crashed during the Rank-Up mission. Usually Warframe crashes a few times a day on my computer and then can go for several hours at a time with no incident, but the fact that I've to wait 24 hours to retry the mission, and I'm on the cusp of being able to construct a Rhino, which is currently exp-locked, it's a bit frustrating for a new gamer. Is WAR-277802 an error on DE's side or is it something to do with my computer? Is anyone else crashing anytime they try to rank up? Can anyone give advice or help?