hey i have been using xe.com for odoo automatic exchange rate but it has stopped working since april 2021. When i sync it by myself it gives me this error 

  File "/opt/odoo12/addons/currency_rate_live/models/res_config_settings.py", line 328, in _parse_xe_com_data
    for rate_entry in list(rates_table):
TypeError: 'NoneType' object is not iterable

What can possibly be the issue as i am already in production. Kindly help