Error code 100421 means the trading pair your bot tried to trade is currently not available for new orders on BingX. This happens when BingX puts a market in cancel-only mode — existing orders can still be cancelled, but no new orders can be placed.
Why does this happen?
BingX can put a trading pair in cancel-only mode for various reasons, such as maintenance or a delisting. Cryptohopper relies on BingX's API to determine whether a market is active. If BingX reports the market as active, Cryptohopper will attempt to place orders — and this error is the result when that turns out not to be the case.
What you can do
Contact BingX support and ask about the current status of the trading pair. They can tell you whether the market will be restored or permanently delisted, so you know whether to keep or remove the coin from your bot's settings.
Example of this error in your bot's log
04/03/2024 1:05:02 PM ERROR {"code":100421,"msg":"The symbol you request is not available to place order currently, please verify symbol's status in api:/openApi/spot/v1/common/symbols","debugMsg":""} Errortype: ExchangeError