Each time the p25ref dashboard page is refreshed, a string of errors appends to /var/log/lighttpd/error.log. I confirmed the same errors occur when I serve with apache2 instead of lighttpd.
ga900p25.ddns.net:61001

One is associated with tools.php, which I think is self-explanatory:
(mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: Use of undefined constant DISTRIBUTION - assumed 'DISTRIBUTION' (this will throw an Error in a future version of PHP) in /var/www/html/include/tools.php on line 69

The rest of the repetitive errors appear to be associated with GDPR in allheard.php:
(mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: constant(): Couldn't find constant GDPR in /var/www/html/include/allheard.php on line 25
(mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: constant(): Couldn't find constant GDPR in /var/www/html/include/allheard.php on line 31

If I disable allheard.php in index.php, the errors then begin to throw against lh.php.

The only GDPR I know is General Data Privacy Regulation.
Is it possible these GDPR errors are associated with the current version of PHP?
PHP 7.3.31-1deb10u3 (cli) (built: Feb 26 2023 13:00:55) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.31, Copyright (c) 1998-2018 Zend Technologies
with Zend OPcache v7.3.31-1deb10u3, Copyright (c) 1999-2018, by Zend Technologies

I would appreciate any advice you may have.
Regards,
Ken
W4NOC

error.log