BigQuery Instance - "Internal Error"

Question

I am using the bq command line to retrieve a table in GCS.

bq --project_id=<project-id> extract -F "\t" mydataset.mytable gs://mybucket

I get an error:

'An internal error has occurred'

This is a cron job and runs until August 11th. But it started on August 12th.

sample job id: bqjob_r4072d942c3f77277_00000156856cc98c_1