It is similar to https://github.com/keboola/db-extractor-mssql/issues/102, maybe there's a problem with "common" package. For some tables, there is columns property as object, instead of array. 
It is similar to keboola/db-extractor-mssql#102, maybe there's a problem with "common" package.
For some tables, there is columns property as object, instead of array.