pfSense

On 23.05, the following PHP errors can be triggered:

[29-May-2023 19:10:01 Australia/Melbourne] PHP Fatal error:  Uncaught TypeError: fwrite(): Argument #1 ($stream) must be of type resource, bool given in /etc/inc/config.lib.inc:172
Stack trace:
#0 /etc/inc/config.lib.inc(172): fwrite(false, 'a:35:{s:7:"vers...')
#1 /etc/inc/config.lib.inc(147): generate_config_cache(Array)
#2 /etc/inc/config.gui.inc(53): parse_config()
#3 /etc/inc/auth.inc(34): require_once('/etc/inc/config...')
#4 /etc/inc/openvpn.inc(36): require_once('/etc/inc/auth.i...')
#5 /etc/inc/filter.inc(30): require_once('/etc/inc/openvp...')
#6 /etc/inc/ipsec.inc(25): require_once('/etc/inc/filter...')
#7 /etc/inc/gwlb.inc(27): require_once('/etc/inc/ipsec....')
#8 /etc/inc/functions.inc(35): require_once('/etc/inc/gwlb.i...')
#9 /etc/inc/notices.inc(26): require_once('/etc/inc/functi...')
#10 /etc/inc/config.inc(51): require_once('/etc/inc/notice...')
#11 /usr/local/bin/telegraf_pfifgw.php(3): require_once('/etc/inc/config...')
#12 {main}
  thrown in /etc/inc/config.lib.inc on line 172
[29-May-2023 19:10:01 Australia/Melbourne] PHP Fatal error:  Uncaught ValueError: Path cannot be empty in /etc/inc/notices.inc:101
Stack trace:
#0 /etc/inc/notices.inc(101): fopen('', 'w')
#1 /etc/inc/config.lib.inc(1162): file_notice('phperror', 'PHP ERROR: Type...', 'PHP errors')
#2 [internal function]: pfSense_clear_globals()
#3 {main}
  thrown in /etc/inc/notices.inc on line 101

Potentially related:
https://redmine.pfsense.org/issues/14061
https://redmine.pfsense.org/issues/14031