Error while adding snowflake data conetxt

I am having this error DatasourceInitializationError: Cannot initialize datasource my_datasource, error: (snowflake.connector.errors.OperationalError) 250001: Could not connect to Snowflake backend after 0 attempt(s).Aborting
(Background on this error at: Error Messages — SQLAlchemy 1.4 Documentation)

when I am trying to connect snowflake with great expectations.