Man, thought posting a few small images would better explain it all, but absolutely nothing from imgur seems to work anymore (I have used them for a LONG time, apparently they can't or won't give me a link that works with your img tags... and THEN this board wants to keep remnants of several failed attempts (not sure if that is or isn't unique to me).
ANYWAY, I got the same kind of message you wrote... except that is NOT what G'jusana said... that was the image I was trying to post. Says:
"You have already completed all the trials for the equipped relic weapon atma. Make your way to Hyrstmill, and present it to Halzahn."
I did exactly what the game told me to do. Went reading some third party sites, ohhhh, has to be unequipped. So I tried that. Still no good. Tried re-logging. STILL no good. However, you bet your donuts I NEED to get this after I spent a ton of time doing what the game had me do to get it. I have the Exarchic rod, I want it to LOOK like the power that is in that weapon.