When you see the error 'POST https://api.bitvavo.com/v2/order 400 {"errorCode":212,"error"' in your Bitvavo trading bot output, it means that the buy or sell orders you are trying to place on Bitvavo are too small.
Bitvavo has a minimum trade amount of 5 EUR, but for some cryptocurrencies, it may be higher depending on the quantity of cryptocurrency you want to buy or sell.
An example of such an error message in the trading bot output looks like this:
04/16/2024 12:39:00 PM ERROR POST https://api.bitvavo.com/v2/order 400 {"errorCode":212,"error":"You set the amount to less than the minimum value possible for this market. To check the minimum amounts, call https://api.bitvavo.com/v2/markets and check minOrderInQuoteAsset and minOrderInBaseAsset."}