Install of -devel failed

[JonH]

pfSense 2.4.4 release p2 on a SG-2440
Running pfBlockerNG 2.1.4.16
Saved settings & disabled pfBlockderNG.
Uninstalled package.
Installed pfBlockerNG-devel 2.2.5-20
Received a php error:
pfblockerng_general.php, Line: 111, Message: Uncaught Error: Call to undefined function pfb_alerts_default_page()

Attached various crash & log reports.
Reinstalled 2.1.4.16 and that is working ok.
Pls advise how to do this correctly.
0_1547797488488_PHP_errors.log.zip
Thanks, Jon

[JonH]

Attaching the /conf pkg-log text file which appears that the install is in good order.
0_1547868374225_pkg_log_pfSense-pkg-pfBlockerNG-devel-2.txt.zip