Error while making a call. Message: size is too accurate

[ZeroFux78]

php bots/waverider.php -p XLM-USD -bw 40 -g 10 -pv 5
[i] Trading XLM-USD
[i] Will buy 40 USD in XLM
[i] Will sell when XLM will gain 10%, meaning when it's worth 44 USD
[i] After selling I will wait for XLM to drop by 5% before re-buying

====== BOT STARTING ======

[i] 40 USD currently is 141.2354572 XLM
[!] Buying 141.2354572 XLM!
[X] Error while making a call. Message: size is too accurate. Smallest unit is 1.00000000
Current worth: 40.068075501268 Change: +0.07 USD

I have a different bot running with BTC-USD and it was able to execute fine, but when I tried to use XLM, I receive this error message.