Well, I tried the repair yesterday and it fixed it. Today it was greyed out again. Repair twice did not fix it. I think the nightly updates are part of it “resetting” and being greyed out. I’ve been patient but this is really getting frustrating. I was fine the first couple of weeks thinking the auction house was not necessary to gameplay but now in later levels I could really use it to make some gold or get some appropriate gear for my level.