AttributeError: 'NoneType' object has no attribute 'Client'

[alvynabranches]

INFO:apache_beam.runners.dataflow.dataflow_runner:Could not estimate size of source <apache_beam.io.gcp.bigquery._CustomBigQuerySource object at 0x7faa91a5c0d0> due to an exception: Traceback (most recent call last):
File "/home/alvynabranches/redit_data/venv/lib/python3.9/site-packages/apache_beam/runners/dataflow/dataflow_runner.py", line 1186, in run_Read
transform.source.estimate_size())
File "/home/alvynabranches/redit_data/venv/lib/python3.9/site-packages/apache_beam/io/gcp/bigquery.py", line 764, in estimate_size
bq = bigquery_tools.BigQueryWrapper()
File "/home/alvynabranches/redit_data/venv/lib/python3.9/site-packages/apache_beam/io/gcp/bigquery_tools.py", line 336, in init
self.gcp_bq_client = client or gcp_bigquery.Client(
AttributeError: 'NoneType' object has no attribute 'Client'