Inventors quantify - small dreamsI'm not going to tell you anything. This means that when the review is done, the funds are not enough and the order cannot be placed. - ```TypeError: Cannot convert "null" to double `` This should be the subroutine after the failure of exchange.Buy/Sell. These subroutines return null, and then pass null as a parameter. The function, which needs to receive double type data, passes null and returns an error.