I'm getting internal server error 500 while loading data into BigQuery

[laurence_de]

Recently I'm working on a project to load dataframe into BigQuery, using this method in "Load data from DataFrame guide"

However, while running this function: 

job = client.load_table_from_dataframe(file_data, table_ref, job_config=job_config)

This error occurs:

InternalServerError: 500 POST  unknown error

I've checked the parameters, table_ref consists of project_id.dataset_name.table_name

And the job_config consists of the required schema, I'm not sure what else I'm missing here.

Can anyone give me some advice about this issue?
Thanks a lot!