Thanks, I should have thought of that.
The log says:
2025-01-13 15:44:13 - WARN --> Undefined variable $xrow_id [F:\wamp64\www\CA20rc1a\app\lib\BaseModel.php:6698]
2025-01-13 15:44:13 - WARN --> preg_match(): Compilation failed: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u at offset 25 [F:\wamp64\www\CA20rc1a\app\helpers\utilityHelpers.php:5031]
2025-01-13 15:44:13 - WARN --> preg_match(): Compilation failed: unrecognized character follows \ at offset 24 [F:\wamp64\www\CA20rc1a\app\helpers\utilityHelpers.php:5031]
Next step is to understand the error message.