Why-were-29-out-of-30-symbols-not-processed

I have just changed from my paper trading Alpaca account to my real money Alpaca account. I entered the new keys. In strategy monitor the log pane shows incomplete, 29 symbols not processed. The dataset has 30 symbols with high liquidity. No other error or warning messages anywhere. I never experienced this in the paper trading account, which traded fine for over a week, with only a few symbols not processed during that time. Is this an Alpaca issue, or something else?