AliceBlue’s system has some additional checks for trigger price which are not present on other brokers. When those checks fail, you would get this error message.
Solution
Try to enter exactly same order directly via their online trading platform ANT. Most likely you will see the same error there. Otherwise you can send the order details along with error to AliceBlue’s help desk and ask for explanation.
Remember this error comes from AliceBlue, so only they can provide valid explanation.