Issue: Some customers are unable to upload files using the Multiple File Uploader and Super Multi File Uploader in the Legacy File Manager. The customers see a blank tab or an "Uh Oh" page.
Status: Our Engineering team is further investigating.
Workaround: In the meantime, you can use the Single File Uploader to upload files in the Legacy File Manager, or upload files using the SB3 File Manager.
Thank you for your patience!