the problem picture is below:
#
$ go get github.com/swaggo/gin-swagger
go get: module github.com/swaggo/gin-swagger: Get "https://goproxy.io/github.com/swaggo/gin-swagger/@v/list": x509: failed to load system roots and no roots provided; SecTrustSettingsCopyCertificates error: -25300
MyMac os version :10.13.1 (17B1003
go version: go1.16.5 darwin/amd64
and my go env is:
$ go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/caibin/Library/Caches/go-build"
GOENV="/Users/caibin/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/caibin/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/caibin/go"
GOPRIVATE=""
GOPROXY="https://goproxy.io,direct"
GOROOT="/usr/local/go"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.16.5"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/zt/qmccm9gs2f98ms8ynt7y4mg40000gn/T/go-build4199856293=/tmp/go-build -gno-record-gcc-switches -fno-common"
l had set goproxy and GO111MODULE, but it is no use