[Bug] 无法下载设计好的图片

[chlorine3545]

如题，控制台报错信息为：

Uncaught (in promise) 
error { target: img, isTrusted: true, srcElement: img, eventPhase: 0, bubbles: false, cancelable: false, returnValue: true, defaultPrevented: false, composed: false, timeStamp: 4729, … }
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bubbles: false
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cancelBubble: false
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cancelable: false
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composed: false
​
currentTarget: null
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defaultPrevented: false
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eventPhase: 0
​
explicitOriginalTarget: <img src='data:image/svg+xml;charset=utf-8,<svg xmlns="http:…'>
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isTrusted: true
​
originalTarget: <img src='data:image/svg+xml;charset=utf-8,<svg xmlns="http:…'>
​
returnValue: true
​
srcElement: <img src='data:image/svg+xml;charset=utf-8,<svg xmlns="http:…'>
​
target: <img src='data:image/svg+xml;charset=utf-8,<svg xmlns="http:…'>
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timeStamp: 4729
​
type: "error"
​
<get isTrusted()>: function isTrusted()
​
<prototype>: EventPrototype { composedPath: composedPath(), stopPropagation: stopPropagation(), stopImmediatePropagation: stopImmediatePropagation(), … }