Error: page.setRequestInterception is not a function

I could not set viewport with pa11y.I'm getting Error.

{
"defaults": {
    "timeout": 1000,
    "page": {
        "viewport": {
            "width": 320,
            "height": 480
        }
    }
},
"urls": [
    "https://sonymobile.com/gb",
    "https://sonymobile.com/gb/products/phone"
]

}

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