@kfiry​ adding to @Werner Stinckens​ did you added projectid in read spark query , projectid should be one where big query instance running. also please follow best practices in terms of egress data cost

spark.read.format("bigquery") \

.option("table", table) \

.option("project", <project-id>) \

.option("parentProject", <parent-project-id>) \

.load()