python codec issue(3)

from sqlalchemy import create_engine

engine = create_engine("oracle://xxx:xxx@xxx:xxx/?service_name=xxx", echo=True)

import pandas as pd

source_bugs = "select * from xxxx"

df_source_bugs = pd.read_sql_query(source_bugs, engine)

[2019-08-22 13:33:28,289] ERROR in app: Exception on /bug_management/list [GET]

Traceback (most recent call last):

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\flask\app.py", line 1982, in wsgi_app

    response = self.full_dispatch_request()

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request

    rv = self.handle_user_exception(e)

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\flask\app.py", line 1517, in handle_user_exception

    reraise(exc_type, exc_value, tb)

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request

    rv = self.dispatch_request()

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\flask\app.py", line 1598, in dispatch_request

    return self.view_functions[rule.endpoint](**req.view_args)

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\dashboard\bugmanage\views.py", line 48, in bug_manage_table

    df_source_bugs = pd.read_sql_query(source_bugs, engine)

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\pandas\io\sql.py", line 314, in read_sql_query

    parse_dates=parse_dates, chunksize=chunksize)

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\pandas\io\sql.py", line 1072, in read_query

    data = result.fetchall()

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\sqlalchemy\engine\result.py", line 1216, in fetchall

    e, None, None, self.cursor, self.context

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\sqlalchemy\engine\base.py", line 1468, in _handle_dbapi_exception

    util.reraise(*exc_info)

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\sqlalchemy\engine\result.py", line 1211, in fetchall

    l = self.process_rows(self._fetchall_impl())

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\sqlalchemy\engine\result.py", line 1161, in _fetchall_impl

    return self.cursor.fetchall()

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\site-packages\sqlalchemy\processors.py", line 74, in process

    return decoder(value, errors)[0]

  File "C:\Users\jalchu\Documents\cloudtools-stap\provision\venv\lib\encodings\utf_8.py", line 16, in decode

    return codecs.utf_8_decode(input, errors, True)

UnicodeDecodeError: 'utf8' codec can't decode byte 0xbf in position 36: invalid start byte