Same thing is happening to me on Xbox. 0 Arx, with the "failed to update" text plastering on the screen. Also, all the "mat trading" earned Arx I did has also not registered as well. Considering I have approximately 34,000 Arx, I have a bit of concern regarding this.
I've also noticed that it take about a minute or two (or longer) for the game to connect with Frontier servers (usually takes seconds).
I've tried to submit a bug report regarding this nonsense, but the Issue Tracker is requiring me to sign in again, and is not accepting my log-in.
But hey, those fleet carriers are going for a million credits....
Anyway, hopefully this is a temporary thing that is rectified soon.