unity package manager ui 报错An ite m with the same key has alrea d ybeen added.Key

unity 在manifest.json 添加了 “com.unity.package-manager-ui”: “2.0.7”,
在unity 界面window下,还是没有Package Manager,
我的报错:
An ite m with the same key has alrea d ybeen added.Key: System.Buffers.dll

unity package manager ui 报错An ite m with the same key has alrea d ybeen added.Key_第1张图片
解决办法:
删除多余的System.Buffers.dll即可

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