When you see the error 'The signature is invalid' in your Bitvavo trading bot, it means that your API Keys have not been copied correctly. The easiest way to resolve this is to create new API Keys using our tutorial 'How to connect with Bitvavo with API Keys.'
Example of the error message in the trading bot output:
04/29/2024 12:05:04 PM ERROR GET https://api.bitvavo.com/v2/balance 403 {"errorCode":309,"error":"The signature is invalid."}