Disclaimer

Known affected versions were inferred from fixed-version data and were not explicitly confirmed by the vendor: 9.1.4

The earliest recollection of this bug is traced back to PAN-OS 8.1 - July 22, 2025. This bug is fixed in PAN-OS versions 9.1.5. Pushing a configuration from a Panorama management server running PAN-OS 9.0 to a firewall running PAN-OS 8.1 produces a HTTP/2 warning. Fixed an issue where pushing a configuration from a Panorama management server running PAN-OS 9.0 to a firewall running PAN-OS 8.1 produced a HTTP/2 warning. To leverage this fix, update both Panorama and the firewall to PAN-OS 9.1.5. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-release-information/known-issues/known-issues-related-to-pan-os-8-1-releases https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-5-addressed-issues