TypeError：您必须为代理类型Ionic

Question

how can I solve this error in ionic `You must specify a "protocol" for the proxy type`

我找到了这个答案，并尝试如下

D:\ENDART> set HTTP_PROXY=http://localhost:4200
D:\ENDART> set HTTPS_PROXY=http://localhost:4200
D:\ENDART> set IONIC_HTTP_PROXY=http://localhost:4200
PS D:\ENDART> set PROXY=http

此设置是否为礼拜式？因为遇到相同的错误...