The earliest recollection of this bug is traced back to PAN-OS 10.1.9 - February 19, 2025.
This bug is fixed in PAN-OS versions 10.1.9.
Fixed an issue with URL filtering where, after upgrading to a PAN-OS 9.1 release, the Continue button on a URL did not work and caused the website to be inaccessible, even though the predefined category of URL was configured to continue traffic. This occurred when URL traffic hit a rule where the custom category was set to None .
For more information:
https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-release-notes/pan-os-10-1-9-known-and-addressed-issues/pan-os-10-1-9-addressed-issues