I am unable to update to the latest Windows Cumulative Update KB5043080

I have been trying to get this update for the past two weeks. Every time I attempt to update it gives me this error message:

I am part of the Windows Insider Program, and am currently and always have been in the "Release Preview"

channel.

I am unsure on how to proceed. I did manage to contact Microsoft Support and get someone to look at my situation on Live Chat, but once they realized I was in the program, the referred me to this forum. 

I am unsure if this could be a consequence of not being able to download this update, but when I try to run certain games from Steam, they don't launch. I have my Nvidia drivers all up to date so that couldn't be the issue.