Call to undefined function Cammac\Workflow\Fields\array_last()

[4n70w4]

{
    "message": "Call to undefined function Cammac\\Workflow\\Fields\\array_last()",
    "exception": "Error",
    "file": "/var/www/nova/vendor/cammac/nova-workflow/src/Fields/Workflow.php",
    "line": 23,
    "trace": [