Error running Redshift to BigQuery job for full refresh/overwrite

Summary

Error encountered while running a job from Redshift to BigQuery for full refresh/overwrite, with a java.lang.NullPointerException


Question

I have connected Redshift to BigQuery for the first time and the job ran successfully loading a table. Today when I tried to run the job again for full refresh/Overwrite, it kept throwing this error. Can someone help please?

Warning from source: Something went wrong in the connector. See the logs for more details.
java.lang.NullPointerException: null value in entry: isNullable=null



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["redshift", "bigquery", "full-refresh", "overwrite", "connector", "java.lang.nullpointerexception"]