I'm developing windows desktop application with electron (aka atom-shell). My app uses browser-sync inside.
When I created asar package(a kind of tar package) and then launched my app,
it was crashed. I got an stack trace, and found the source of problem was 'File Not Found exception' at node_modules/browser-sync-ui/lib/hook.js, Ln: 11.

I found the final path for template file had mixed path separators as / and \. I believe the normal file access case has no problem, but asar package cannot handle well when path separators are mingled.

So I changed the code by using path.join method, then the problem was fixed.

function templateFile (filepath) {
    return fs.readFileSync(path.join(__dirname, "/../templates", filepath || ""), "utf-8");
}

Please check the path has valid form for the template file.