Summary:
files_list plugin has debug info, not php 8.x compatible
Detailed Description:
When using files_list, it displays debug info from line 1420 in
SmartyExt/lib/class.smarty_functions.php
If that section is commented out, it generates a 500 error:
PHP Fatal error: Uncaught TypeError: array_map(): Argument #2 ($array) must be
of type array, null given in
/path/modules/SmartyExt/lib/class.smarty_functions.php:1428