CAN ANYONE ADVISE : Error Extracting from Google Cloud MySQL into BigQuery

I have managed to integrate to CloudMySQL and set the destination to BigQuery as well as select tables to extract.

However extraction keeps failing - I get the following error message on extraction. Any ideas specifically why the error refers to SSL when this integration is not based on SSL and it is not supported:

unknown error (_ssl.c:3053)

Raw Logs

2019-06-16 20:08:41,255Z main - INFO Running tap-mysql version 1.14.0 and target-stitch version 1.8.1
2019-06-16 20:08:41,320Z main - INFO Starting tap to discover schemas: tap-env/bin/tap-mysql --config /tmp/tap_discover_config.json --discover
2019-06-16 20:08:41,468Z tap - INFO Using custom certificate authority
2019-06-16 20:08:41,468Z tap - CRITICAL unknown error (_ssl.c:3053)
2019-06-16 20:08:41,469Z tap - Traceback (most recent call last):
2019-06-16 20:08:41,469Z tap - File “tap-env/bin/tap-mysql”, line 10, in
2019-06-16 20:08:41,469Z tap - sys.exit(main())
2019-06-16 20:08:41,470Z tap - File “/code/orchestrator/tap-env/lib/python3.5/site-packages/singer/utils.py”, line 225, in wrapped
2019-06-16 20:08:41,470Z tap - return fnc(*args, **kwargs)
2019-06-16 20:08:41,470Z tap - File “/code/orchestrator/tap-env/lib/python3.5/site-packages/tap_mysql/init.py”, line 715, in main
2019-06-16 20:08:41,470Z tap - mysql_conn = MySQLConnection(args.config)
2019-06-16 20:08:41,470Z tap - File “/code/orchestrator/tap-env/lib/python3.5/site-packages/tap_mysql/connection.py”, line 140, in init
2019-06-16 20:08:41,470Z tap - super().init(defer_connect=True, ssl=ssl_arg, **args)
2019-06-16 20:08:41,470Z tap - File “/code/orchestrator/tap-env/lib/python3.5/site-packages/pymysql/connections.py”, line 650, in init
2019-06-16 20:08:41,470Z tap - self.ctx = self._create_ssl_ctx(ssl)
2019-06-16 20:08:41,470Z tap - File “/code/orchestrator/tap-env/lib/python3.5/site-packages/pymysql/connections.py”, line 714, in _create_ssl_ctx
2019-06-16 20:08:41,471Z tap - ctx = ssl.create_default_context(cafile=ca, capath=capath)
2019-06-16 20:08:41,471Z tap - File “/usr/lib/python3.5/ssl.py”, line 470, in create_default_context
2019-06-16 20:08:41,471Z tap - context.load_verify_locations(cafile, capath, cadata)
2019-06-16 20:08:41,471Z tap - ssl.SSLError: unknown error (_ssl.c:3053)
2019-06-16 20:08:41,487Z main - INFO Tap exited abnormally with status 1
2019-06-16 20:08:41,488Z main - INFO Exit status is: Discovery failed with code 1 and error message: “unknown error (_ssl.c:3053)”.