I can’t say how to reproduce, it just started showing up after the update to 4.18.4.
PHP 8.2
Standard CSC 4.18.4
[21-Jun-2025 21:29:39 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 21:34:36 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 22:31:21 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 22:32:53 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 22:33:01 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 22:50:04 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 22:56:33 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 22:57:18 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[21-Jun-2025 23:01:47 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 00:10:51 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 05:22:30 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 05:36:20 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 07:42:43 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 07:43:22 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 07:52:16 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 08:01:40 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 08:15:04 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 08:17:08 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 08:19:32 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 08:25:05 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 08:25:16 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 08:25:27 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 09:33:18 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 09:43:42 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 10:00:05 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 10:00:54 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 10:04:38 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266
[22-Jun-2025 10:23:11 America/Chicago] PHP Warning: Undefined array key "obj_prefix" in /home/user/domains/example.com/public_html/app/controllers/frontend/products.php on line 266