• A speaker didn't get the invitationCheck the spam folder and the email address, then send the invitation again or copy the link.
• The link is not validThe link has been renewed or revoked. Ask the organiser for a new one.
• The upload was interruptedChoose the same files again in the same browser and the upload continues where it stopped.
• A version was rejectedA rejected version doesn't replace the previous one. Fix the problem as instructed and upload again.
• Delivery failedThe file couldn't be moved to Drive. The fault is in the system, and the organiser is notified.