求助啊!!命令:yarn install 出错:error An unexpected error occurred: "Invalid protocol: null".??

PS D:\laragon\www\larabbs> yarn install --no-bin-links
yarn install v1.9.4
info There appears to be trouble with your network connection. Retrying...
[1/4] Resolving packages...
[2/4] Fetching packages...
info There appears to be trouble with your network connection. Retrying...
error An unexpected error occurred: "Invalid protocol: null
info If you think this is a bug, please open a bug report with the information provided in "D:\laragon\www\larabbs\yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
events.js:183
throw er; // Unhandled 'error' event
^

Error: Invalid protocol: null
at Request.module.exports.Request.init (D:\Yarn\lib\cli.js:137737:31)
at new Request (D:\Yarn\lib\cli.js:137410:8)
at request (D:\Yarn\lib\cli.js:126685:10)
at RequestManager.execute (D:\Yarn\lib\cli.js:64254:15)
at RequestManager.shiftQueue (D:\Yarn\lib\cli.js:64281:10)
at D:\Yarn\lib\cli.js:64157:16
at reject (D:\Yarn\lib\cli.js:64166:7)
at onError (D:\Yarn\lib\cli.js:64184:9)
at Request.params.callback [as _callback] (D:\Yarn\lib\cli.js:64193:11)
at self.callback (D:\Yarn\lib\cli.js:137468:22)


《L05 电商实战》
从零开发一个电商项目,功能包括电商后台、商品 & SKU 管理、购物车、订单管理、支付宝支付、微信支付、订单退款流程、优惠券等
《L04 微信小程序从零到发布》
从小程序个人账户申请开始,带你一步步进行开发一个微信小程序,直到提交微信控制台上线发布。
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