400 Error while craeting embeddings running setup notebook

[Mona19]

~/Open_Data_QnA/dbconnectors/BQConnector.py:459, in BQConnector.get_column_samples(self, columns_df)
454 for index, row in columns_df.iterrows():
455 get_column_sample_sql=f'''SELECT STRING_AGG(CAST(value AS STRING)) as sample_values FROM UNNEST((SELECT APPROX_TOP_COUNT({row["column_name"]},5) as osn
456 FROM {row["project_id"]}.{row["table_schema"]}.{row["table_name"]}
...
--> 494 raise exceptions.from_http_response(response)
496 if expect_json and response.content:
497 return response.json()

BadRequest: 400 POST https://bigquery.googleapis.com/bigquery/v2/projects/nyct-predictive-maintenance/queries?prettyPrint=false: No matching signature for operator - for argument types: STRING, STRING. Supported signatures: INT64 - INT64; NUMERIC - NUMERIC; BIGNUMERIC - BIGNUMERIC; FLOAT64 - FLOAT64; DATE - INT64; DATE - DATE; TIMESTAMP - TIMESTAMP; DATETIME - DATETIME; TIME - TIME; TIMESTAMP - INTERVAL; DATE - INTERVAL; DATETIME - INTERVAL; INTERVAL - INTERVAL at [1:96]
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