If you see the error code '309 The signature is invalid' on Bitvavo, it means something went wrong with creating the API Key, likely when pasting the API Keys.

The easiest solution is to create entirely new API Keys and carefully follow the steps provided. Check out our article 'How to connect to Bitvavo with API keys'.

Example of the error shown in your 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."}