Trying to navigate to Active Rules for an interface yields a blank (white) page.

I have a Netgate 4200 MAX, 26.03-RELEASE (amd64).

In Global Settings I have Snort VRT with code, Enable ET Open, Enable OpenAppID + Text Rules, Enable FEODO Tracker Botnet C2 IP Rules

Services / Snort Interface Settings / PORT1WAN - Categories

• Resolve Flowbits
• Use IPS Policy : Security
  Mode : Policy

Services / Snort Interface Settings / PORT1WAN - Rules

• Trying to view the Available Rule Categories, selecting Active Rules causes a momentary spin, then a blank page.

Then on the dashboard there is an error report link:

Crash report begins.  Anonymous machine information:

amd64
16.0-CURRENT
FreeBSD 16.0-CURRENT #36 plus-RELENG_26_03-n256531-4923e82e59d1: Fri Mar 20 18:22:49 UTC 2026     root@pfsense-build-release-amd64-1.eng.atx.netgate.com:/var/jenkins/workspace/pfSense-Plus-snapshots-26_03-main/obj/amd64/TVcqnR7U/var/jenkins/workspace/pfSe

Crash report details:

PHP Errors:
[09-May-2026 11:35:01 US/Central] PHP Fatal error:  preg_replace(): Cannot use output buffering in output buffering display handlers in /usr/local/www/csrf/csrf-magic.php on line 163
Stack trace:
#0 /usr/local/www/csrf/csrf-magic.php(163): preg_replace()
#1 [internal function]: csrf_ob_handler()
#2 {main}

No FreeBSD crash data found.