We noticed that you have a lot of similar errors for some questions. You can download the specification which we reference below to understand how to correct the data. Once you have fixed these errors you can upload again.
You also have other errors in your file which you can either fix them in the CSV file or you can reupload and fix on CORE. <%= govuk_link_to "View the full report", bulk_upload_lettings_result_path(@bulk_upload) %>