SyntaxError: Cannot use import statement outside a module

[savissimo]

Hi,

I've downloaded the project and tried to start a new project, but when I ran yarn start I got this error:

SyntaxError: Cannot use import statement outside a module

It's the first of several errors: this is the full output.

Hash: b1b3ba31d294236f7496
Version: webpack 3.12.0
Time: 744ms
                                      Asset       Size  Chunks             Chunk Names
assets/680cc53b169b85a0f6f38e81bdbe6ae7.png  608 bytes          [emitted]
assets/97cf154a0cfd1bc32d9bbd3ecdb5039c.png  966 bytes          [emitted]
assets/b22c4bab11c61f1f3a7f30f23eaf6958.png    1.86 kB          [emitted]
assets/9b4d7806bf6c720e7457a4f98f4bd0e0.png    3.94 kB          [emitted]
assets/4c3924c036400f331da5c5c25db38ae5.png    1.42 kB          [emitted]
assets/a21ed6864fa22cd067af0e1dc70b4578.png    4.31 kB          [emitted]
assets/66b04ade4c414e010b3403d74e2fce1c.png    11.9 kB          [emitted]
                              manifest.json    3.96 kB       0  [emitted]  main
   [0] ./src/manifest.json 1.49 kB {0} [built] [failed] [1 error]
   [1] ./node_modules/prop-loader?name!./package.json 44 bytes [built]
   [2] ./node_modules/prop-loader?version!./package.json 25 bytes [built]
   [3] ./node_modules/prop-loader?description!./package.json 48 bytes [built]
   [4] ./node_modules/prop-loader?author!./package.json 55 bytes [built]
   [5] ./src/options/index.html 0 bytes [not cacheable] [built]
   [6] ./src/icon/16.png 89 bytes [built]
   [7] ./src/icon/48.png 89 bytes [built]
   [8] ./src/icon/96.png 89 bytes [built]
   [9] ./src/icon/128.png 89 bytes [built]
  [10] ./src/popup/index.html 0 bytes [not cacheable] [built]
  [11] ./src/popup/icon/16.png 89 bytes [built]
  [12] ./src/popup/icon/32.png 89 bytes [built]
  [13] ./src/popup/icon/64.png 89 bytes [built]
  [14] ./src/background/index.js 1.49 kB [built]
    + 1 hidden module

ERROR in ./src/manifest.json
Module build failed: ./background/index.js:6
import { getOS } from './getos';
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at new Script (vm.js:100:7)
    at runScript (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\extricate-loader\index.js:65:18)
    at Object.<anonymous> (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\extricate-loader\index.js:33:42)
    at next (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\webpack\lib\dependencies\LoaderPlugin.js:52:15)
    at D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\webpack\lib\dependencies\LoaderPlugin.js:29:12
    at processTicksAndRejections (internal/process/task_queues.js:75:11)

ERROR in ./src/manifest.json
Module build failed: ModuleBuildError: Module build failed: ./background/index.js:6
import { getOS } from './getos';
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at new Script (vm.js:100:7)
    at runScript (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\extricate-loader\index.js:65:18)
    at Object.<anonymous> (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\extricate-loader\index.js:33:42)
    at next (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\webpack\lib\dependencies\LoaderPlugin.js:52:15)
    at D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\webpack\lib\dependencies\LoaderPlugin.js:29:12
    at processTicksAndRejections (internal/process/task_queues.js:75:11)
    at D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\webpack\lib\NormalModule.js:195:19
    at D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\loader-runner\lib\LoaderRunner.js:367:11
    at D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\loader-runner\lib\LoaderRunner.js:233:18
    at context.callback (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\loader-runner\lib\LoaderRunner.js:111:13)
    at D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\extricate-loader\index.js:58:13
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
 @ ./src/manifest.json
Child extract-text-webpack-plugin node_modules/extract-text-webpack-plugin/dist node_modules/raw-loader/index.js!node_modules/extricate-loader/index.js!node_modules/interpolate-loader/index.js!src/manifest.json:
     7 assets
       [0] ./node_modules/raw-loader!./node_modules/extricate-loader!./node_modules/interpolate-loader!./src/manifest.json 780 bytes {0} [built] [failed] [1 error]
       [1] ./node_modules/prop-loader?name!./package.json 44 bytes [built]
       [2] ./node_modules/prop-loader?version!./package.json 25 bytes [built]
       [3] ./node_modules/prop-loader?description!./package.json 48 bytes [built]
       [4] ./node_modules/prop-loader?author!./package.json 55 bytes [built]
       [5] ./src/background/index.js 1.49 kB [built]
       [6] ./src/options/index.html 0 bytes [not cacheable] [built]
       [7] ./src/icon/16.png 89 bytes [built]
       [8] ./src/icon/48.png 89 bytes [built]
       [9] ./src/icon/96.png 89 bytes [built]
      [10] ./src/icon/128.png 89 bytes [built]
      [11] ./src/popup/index.html 0 bytes [not cacheable] [built]
      [12] ./src/popup/icon/16.png 89 bytes [built]
      [13] ./src/popup/icon/32.png 89 bytes [built]
      [14] ./src/popup/icon/64.png 89 bytes [built]
        + 1 hidden module

    ERROR in ./node_modules/raw-loader!./node_modules/extricate-loader!./node_modules/interpolate-loader!./src/manifest.json
    Module build failed: ./background/index.js:6
    import { getOS } from './getos';
    ^^^^^^

    SyntaxError: Cannot use import statement outside a module
        at new Script (vm.js:100:7)
        at runScript (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\extricate-loader\index.js:65:18)
        at Object.<anonymous> (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\extricate-loader\index.js:33:42)
        at next (D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\webpack\lib\dependencies\LoaderPlugin.js:52:15)
        at D:\ss\varisw\Parsifal\srs-data-parser-extension\node_modules\webpack\lib\dependencies\LoaderPlugin.js:29:12
        at processTicksAndRejections (internal/process/task_queues.js:75:11)