Add

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    width="512"
    height="512"
    viewBox="0 0 64 64"
>
    <linearGradient
        id="a"
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        x2="60.75"
        y1="32"
        y2="32"
        gradientUnits="userSpaceOnUse"
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        <stop offset="0" stop-color="#5bb4f6" />
        <stop offset=".61" stop-color="#2191e5" />
        <stop offset="1" stop-color="#007edb" />
    </linearGradient>
    <linearGradient id="b" x1="22.3" x2="41.7" href="#a" />
    <g>
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        />
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</svg>