If you face an error stating that your trading mode on the exchange does not correspond to the one on Wunderbit, it means that when creating your API-profile on Wunderbit you choose the wrong Trading mode.
Please make sure that:
Your Trading mode (Hedge vs. one-way mode) on the exchange is identical to the one you chose on Wunderbit when creating your API-profile.
To change your Trading mode, please follow this guide:
https://help.wundertrading.com/en/articles/5846811-hedge-mode
If it does not help, feel free to contact our support by clicking the Support button located in the navigation panel on the left side of your cabinet.