Plugin Template - Manually imported - unable to activate

I am a newbie coder.
I’m trying to build an alert system on notes, so we can put a specific tag and time on a note and receive a pop-up on the note.
When I import it on the .obsidian/plugins folder, then go to community plugins to enable it, it remains disabled despite me trying to activate it. It stays permanently like the picture attached:


It may be something in the code? or is there a step I am missing? There is need of publishing the code? or the error may be somewhere else?

Thanks in advance,

You need to install node, and run npm install, thus npm run build

There is a good tutorial here : Obsidian Plugin Developer Docs | Obsidian Plugin Developer Docs

Moved to Developers & API.