If you are using a VPN, trying turning it off and uploading again.
If you have another network you can join, try switching networks and uploading again.
If you are on a company intranet, the Resonate Cloud might be blocked by your IT administrators. Try submitting a support ticket to have Resonate whitelisted.
If you have access to Google Drive or Dropbox, upload the recording and share the files with your Resonate Client Coordinator.
If the problem continues, please contact your Resonate Client Coordinator so we can help investigate.