The earliest recollection of this bug is traced back to PAN-OS 8.1.22 - January 09, 2024. This bug is fixed in PAN-OS versions 9.1.3, 8.1.22. Fixed an issue where generating subordinate ECDSA Certificate Authority (CA) certificates from the web interface failed if the Common Name field contained a space. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-22-addressed-issues https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-3-addressed-issues