Issue Description:
I'm experiencing an InvalidBusinessParameterError when trying to query cross-border flows using the query_crossborder_flows method. The error message doesn't provide any further details, making it difficult to understand what's going wrong. I am useing the version 0.5.10.
Code to reproduce the error:
from entsoe import EntsoePandasClient
client = EntsoePandasClient(api_key=<YOUR API KEY HERE>)
start = pd.to_datetime('2020-01-01').tz_localize('UTC')
end = pd.to_datetime('2020-01-02').tz_localize('UTC')
client.query_crossborder_flows("IT_CNOR","IT_SARD", start=start, end=end)
Issue Description: I'm experiencing an InvalidBusinessParameterError when trying to query cross-border flows using the query_crossborder_flows method. The error message doesn't provide any further details, making it difficult to understand what's going wrong. I am useing the version 0.5.10.
Code to reproduce the error: