Unable to buy and sell 21coin

Invalid Order
Invalid order submit configuration: min.

Buy 21 with BTC
Last sell:
0.00000000Your BTC balance:
1.12427023
Amount to buy     21   0.0000 min
Rate     BTC
Fee  (0.18%)   0.00000000 21
Total   0.00000000 BTC

Sell 21 for BTC
Last buy:
0.00000000Your 21 balance:
0.01001000
Amount to sell     21   0.0000 min
Rate     BTC
Fee  (0.18%)   0.00000000 BTC
Total   0.00000000 BTC