Prolem with uglify

I'm trying to use Vue Worker, but I get errors with Uglify when I run gulp --production

https://github.com/israelss/vue-worker

What can i be?

emil@debian:/var/www/dashboard$ gulp --production
[16:37:02] Using gulpfile /var/www/dashboard/gulpfile.js
[16:37:02] Starting 'all'...
[16:37:02] Starting 'sass'...
[16:37:04] Finished 'sass' after 2.4 s
[16:37:04] Starting 'webpack'...
{ Error
    at new JS_Parse_Error (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:1534:18)
    at js_error (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:1542:11)
    at croak (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2089:9)
    at token_error (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2097:9)
    at expect_token (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2110:9)
    at expect (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2113:36)
    at eval (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2686:13)
    at eval (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2136:24)
    at expr_atom (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2616:35)
    at maybe_unary (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2792:19)
  message: '/var/www/dashboard/app.js: SyntaxError: Unexpected token punc «(», expected punc «:»',
  fileName: '/var/www/dashboard/app.js',
  lineNumber: 42975,
  stack: 'Error\n    at new JS_Parse_Error (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:1534:18)\n    at js_error (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:1542:11)\n    at croak (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2089:9)\n    at token_error (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2097:9)\n    at expect_token (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2110:9)\n    at expect (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2113:36)\n    at eval (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2686:13)\n    at eval (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2136:24)\n    at expr_atom (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2616:35)\n    at maybe_unary (eval at <anonymous> (/var/www/dashboard/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:28:1), <anonymous>:2792:19)',
  showStack: false,
  showProperties: true,
  plugin: 'gulp-uglify' }