Upgrading the main ZCM server, I got "This device was unable to rebuild the deployment packages. Check the loader-messages.log on the device for more details."

Redeploying the update does not fix this.

zman surp "Update for ZCM (10.3.1)" says it will attempt this, but it does not resolve it.

Also have noticed that new bundles do not deploy to devices. I can see the new version in the Z icon, but they never deploy.

?? Time for a support case?