我试图在chrome：// newtab上更改图像

Question

如何修复错误？如果我将代码粘贴到开发控制台中它可以工作，但是如果我运行它，图像不会改变，除非我停止（）;然后打破搜索栏和背景

CODE

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document.getElementById('hplogo').src="https://upload.wikimedia.org/wikipedia/en/thumb/6/63/IMG_%28business%29.svg/1280px-IMG_%28business%29.svg.png";

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<div class="" id="lga" style="height: 250px;"><img alt="Google" height="92" id="hplogo" src="/images/branding/googlelogo/2x/googlelogo_light_color_272x92dp.png" width="272" title="Google" style="padding-top: 115px;"><div id="logo-sub"></div></div>

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ERROR

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VM13104:2 TypeError: Cannot set property 'src' of null
    at Window.eval (eval at <anonymous> (:2:479), <anonymous>:15:38)
    at <anonymous>:2:479
    at eval (eval at <anonymous> (:2:479), <anonymous>:2:1)
    at eval (eval at <anonymous> (:2:479), <anonymous>:3:3)
    at Object.eval (eval at <anonymous> (:2:479), <anonymous>:16:6)
    at eval (eval at <anonymous> (:2:479), <anonymous>:16:50)
    at eval (<anonymous>)
    at <anonymous>:2:479
    at Object.c [as F_c] (<anonymous>:2:324)
    at Object.E_u (<anonymous>:3:143)

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