Update, I was finally able to complete the mission. I'm not sure if it was a hotfix or if taking the advice to reset my router did the trick, however it now works. I did some forum research on the error code I was getting and according to Devs/Community managers, the code most often appears when connection issues are at play. Whether or not that is a thing, I can't honestly confirm, but as I did reset my router and restart my computer, it seems to have worked.