Are you using this link to upload files in Zebra?

Please use the main Zebra application instead and install CloudFlare Warp to fix the upload problem.

Go to zebra.mediahuisgroup.com

Download Cloudflare Warp here:
https://developers.cloudflare.com/cloudflare-one/team-and-resources/devices/warp/download-warp/
(latest stable release)

If you do not have permissions to install software on your Mediahuis managed device, call ServiceDesk.