软件包github.com/matcornic/hermes/v2：在以下任何位置都找不到软件包“ github.com/matcornic/hermes/v2”：

I want to use Golang email template and when I run

go get -u github.com/matcornic/hermes/v2 it returns

package github.com/matcornic/hermes/v2: cannot find package "github.com/matcornic/hermes/v2" in any of: /usr/local/go/src/github.com/matcornic/hermes/v2 (from $GOROOT) /home/User/go/src/github.com/matcornic/hermes/v2 (from $GOPATH)

My go Variables

GOPATH - /home/User/go
GOROOT - /usr/local/go
GOBIN - 

I fight with this error the whole day, But I can't find out a solution. Please help me.

I set MY gopath to another directory several times but it does not work

I am writing code in this directory

/home/User/go/src/Go-Web

and inside Go-Web my current project lies