Caught an error while attempting to run AST visitor!

[roobscoob]

node = {
    "type": "FunctionExpression",
    "start": 4477,
    "end": 4508,
    "range": [
        4477,
        4508
    ],
    "id": null,
    "expression": false,
    "generator": false,
    "async": false,
    "params": [
        {
            "type": "Identifier",
            "start": 4486,
            "end": 4495,
            "range": [
                4486,
                4495
            ],
            "name": "_0x384137"
        },
        {
            "type": "Identifier",
            "start": 4496,
            "end": 4505,
            "range": [
                4496,
                4505
            ],
            "name": "_0x323bb1"
        }
    ],
    "body": {
        "type": "BlockStatement",
        "start": 4506,
        "end": 4508,
        "range": [
            4506,
            4508
        ],
        "body": []
    }
} 
err = TypeError: Cannot read properties of undefined (reading 'type')

Source file: device.txt