将'GoDebug'插件用于Sublime时遇到问题

I've installed the GoDebug package using Package Control in Sublime text 3(Mac), and tried to run it by right-click > Delve > Enable.

It gives this Error:

An open project is required

I also tried to manually put the following code in my project file MyGoProject.sublime-project

"settings":
{
  "delve_enable": true
}

still, it doesn't seem to have any effect. :(

or is there any similar plugin to debug go programs in Sublime effectively?

Note: Please don't suggest other text editors (Atom, VS code, etc), that can't beat the speed of Sublime.