This error message appears. It does not seem to negatively impact the program's execution.
ERROR:ibapi.wrapper:ERROR 2147483647 321 Error validating request.-'ce' : cause - Non-existent FA data operation request.
This error message seems to result from the following line in tws_client.py:
self.requestFA(2) # request PROFILE. See FaDataTypeEnum.
I do note that the accounts_allocation_profiles table does not seem to be populated. See #5.