Hi there! I am Mike. Newbie. Happened to me and I did the following to resolve the error message.
Actually, you have to choose pool mining in miner setting. And you have to decide you prefer to mine 0 -100 pool, 50 - 50 pool or 100 - 0 pool. By default the Blango miner will choose 50 - 50% which if you have a 30TB or more HDD space. You have to enter use the rewards assignment page and enter you preference method of mining:
0 - 100 pool (GB - 30 TB HDD Space)
Set reward recipient to 888561138747819634
50 - 50 pool (30 TB - 250 TB HDD Space)
Set reward recipient to 9225891750247351890
100 - 0 pool (250 TB or more HDD Space)
Set reward recipient to 12753605638793301951
Close the miner. Choose pool mining. Start mining.