A. 1. Check your internet connection to ensure it is stable. A weak connection can cause upload failures. 2. Clear your browser cache and cookies, as this can resolve issues related to outdated or corrupted data. 3. Try using a different browser or device to see if the issue persists. 4. Ensure that your files meet KDP's formatting and size requirements. If they do not, adjust them accordingly before attempting to upload again.
B. 5. If the problem continues, try uploading during off-peak hours when server traffic is lower. 6. Disable any browser extensions that may interfere with uploads, such as ad blockers or privacy tools.