It sounds like the issue might be with how the file upload field is mapped to the contact record in HubSpot. If the field isn’t properly connected, the file won’t be stored or accessible when you click the submission. I’d recommend checking your form settings to make sure the upload field is mapped to a property that supports file attachments.
In general, once everything is configured correctly, HubSpot should handle file sharing between candidates and your team automatically — meaning the uploaded files get stored and can be viewed directly from the contact record without errors. Is the error or the issue still persist you can use can visit the website xendarapp.com to download the app to resolve the issue.