I had a look into your transaction. If you open the transaction in wallee you can find more information why the transasction failed.
In your case the issue is:
> There is an issue with the configuration. Please check the 'Merchant
> Id', 'Secret Key' and 'Secret Key Version' settings in the procesor
So please verify the credentials of your processor configuration. If this does not help please create an issue using the support button in wallee as this is a specific issue to your setup.