Hi guys, I had this same problem over the weekend however it wasn't the content packages that were at fault. Panorama was pushing to a device group and in my instance, the firewall wasn't getting the config and showing as "failed error: threat database handler failed" There was a piece of config on Panorama that was pushing out to the firewall that it didn't like. Once this was resolved in the device group, I was then able to re-push again. To test this you can push to a singular device to see if the error comes back.
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