API response error when calling withdrawalHistory()

[jfbarens]

From the documentation, this code return an error:

from python_bitvavo_api.bitvavo import Bitvavo

bitvavo = Bitvavo('<APIKEY>', '<APISECRET>')
response = bitvavo.withdrawalHistory({})
print(response)

Response:

{'errorCode': 101, 'error': 'Unknown error. Operation may or may not have succeeded.'}

[RaoulSuurmeijer]

It's happening in the java version as well
bitvavo/java-bitvavo-api#15