Look at the currency forum, several people are having the same problem as me.
Did you already expose your problem in the yobit chat? There is something that I can not understand, yobit is the worst exchange exists until today, by the data of the coinmarketcap:
https://coinmarketcap.com/currencies/universal-currency/#marketsUniversal Currency Markets
# Source Pair Volume (24h) Price Volume (%)
1 Cryptopia UNIT/BTC $2 008 680 $0.594942 91.51%
2 CoinExchange UNIT/BTC $182 700 $0.579286 8.32%
3 YoBit UNIT/BTC $3 723 $0.625159 0.17%
you could have chosen other exchange, would have been the best option