如果你使用的是公司代理，并且在Mac上，只需确保你的http/https复选框被选中并应用。

设置您的PC ->网络和互联网代理->自动代理设置然后 set“自动检测设置”为“关闭”，并清除“脚本地址”

我花了一天的时间，试遍了这里的一切。 对我来说，我没有在Visual Studio中更新我的密码!

I had changed my work Microsoft account password last week or so, I also use that account to login to visual studio, however I wasn't prompted to update it and was not logged out of Visual Studio, it remained logged in. When I clicked on my initials in the top right of visual studio > Account settings > under All Accounts the work account had yellow exclamation triangle warning sign next to it, updated the new password, then updated some packages, dotnet restore, cleaned & rebuilt and the errors are gone.

我在Windows 10中使用docker-compose up命令在Dockerfile中运行RUN dotnet restore时遇到了同样的错误。

我已经尝试了互联网上提供的所有可能的解决方案，也一直在关注这个公开的问题。最后，在花了8个多小时后，通过遵循前面的步骤，我能够解决我的问题。

Uninstall Docker from your system Restart your system Install Docker from this link. Below is the version of my Docker Restart your system Start Docker for Windows, search Docker in the search bar in Windows. Make sure it is running. You should also go to Services.msc and make sure the services Docker Engine and Docker for Windows Service are running. At last, you must check your Nuget.config file from C:\Users\{Username}\AppData\Roaming\NuGet. For me, the content of that file was as below. <?xml version="1.0" encoding="utf-8"?> <configuration> <packageSources> <add key="nuget.org" value="https://api.nuget.org/v3/index.json" /> </packageSources> <packageRestore> <add key="enabled" value="True" /> <add key="automatic" value="True" /> </packageRestore> <bindingRedirects> <add key="skip" value="False" /> </bindingRedirects> <packageManagement> <add key="format" value="0" /> <add key="disabled" value="False" /> </packageManagement> </configuration> Hope this helps.

那些说要删除Nuget的答案。如果您正在使用自定义提要，Config将不起作用。如果您正在使用自定义提要，则需要编辑Nuget。配置文件指向自定义提要的索引。

我删除了%localappdata%/Nuget中的所有内容，并清除了NuGets缓存。

dotnet nuget locals all --clear

重新启动后，Visual studio 2022恢复了我的包。