mysql connector utf8 problem

[iagapov]

petra = PetraMachineAdapter.create_for_simulation() throws an exception in mysql connecto, like so

cnx = mysql.connector.connect(user="root", password="admin", host="localhost", port=3306, database="sim_db")
Traceback (most recent call last):
File "", line 1, in
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/pooling.py", line 287, in connect
"Failed adding connection; queue is full")
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/connection.py", line 137, in init
[str(x) for x in version.VERSION[0:3]]
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/abstracts.py", line 1095, in connect
isolation_level=None, readonly=None):
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/connection.py", line 544, in _open_connection

File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/abstracts.py", line 1271, in set_converter_class

File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/conversion.py", line 136, in init
Escapes special characters as they are expected to by when MySQL
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/conversion.py", line 59, in init
self.str_fallback = str_fallback
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/conversion.py", line 73, in set_charset
def set_unicode(self, value=True):
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/constants.py", line 775, in get_charset_info
NO_UNSIGNED_SUBTRACTION = 'NO_UNSIGNED_SUBTRACTION'
File "/Users/ia/workspace/ml/acss/acss-services/demos/.venv/lib/python3.8/site-packages/mysql/connector/constants.py", line 746, in get_default_collation
@classmethod
mysql.connector.errors.ProgrammingError: Character set 'utf8' unsupported