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[Simpartant]

At "Run gulp to build sources",
15:40:42] Using gulpfile ~/workspace/company/blur-admin-master/gulpfile.js
[15:40:42] Starting 'scripts'...
[15:40:42] Starting 'styles'...
[15:40:43] Starting 'stylesAuth'...
[15:40:43] Starting 'styles404'...
[15:40:43] Starting 'copyVendorImages'...
DEPRECATION WARNING on line 41 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #209e91 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 41 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #90b900 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 41 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #2dacd1 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 41 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #dfb81c minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 41 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #e85656 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 29 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #209e91 plus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 36 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #209e91 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 29 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #d6d6d6 plus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 36 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #d6d6d6 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 29 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #90b900 plus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 36 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #90b900 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 29 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #2dacd1 plus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 36 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #2dacd1 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 29 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #dfb81c plus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 36 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #dfb81c minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 29 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #e85656 plus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 36 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #e85656 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 29 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #949494 plus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 36 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #949494 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 132 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #209e91 minus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 134 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #209e91 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 132 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #e85656 minus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 134 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #e85656 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 132 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #2dacd1 minus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 134 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #2dacd1 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 132 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #90b900 minus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 134 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #90b900 minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 132 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #dfb81c minus 12 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

DEPRECATION WARNING on line 134 of /Users/tason/workspace/company/blur-admin-master/src/sass/theme/_buttons.scss:
The operation #dfb81c minus 24 is deprecated and will be an error in future versions.
Consider using Sass's color functions instead.
http://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions

[15:40:45] Finished 'styles404' after 2.41 s
[15:40:45] Starting 'inject404'...
[15:40:45] Finished 'stylesAuth' after 2.44 s
[15:40:45] Starting 'injectAuth'...
[15:40:45] gulp-inject 1 files into 404.html.
[15:40:45] gulp-inject 1 files into auth.html.
[15:40:45] gulp-inject 1 files into reg.html.
[15:40:46] Finished 'inject404' after 310 ms
[15:40:46] Finished 'injectAuth' after 315 ms
[15:40:46] gulp-inject 1 files into main.scss.
[15:40:46] Finished 'styles' after 3.7 s
[15:40:47] Finished 'copyVendorImages' after 3.72 s
[15:40:47] all files 244.11 kB
[15:40:47] Finished 'scripts' after 5.14 s
[15:40:47] Starting 'inject'...
[15:40:47] gulp-inject 1 files into index.html.
[15:40:47] gulp-inject 139 files into index.html.
[15:40:47] Finished 'inject' after 170 ms
[15:40:47] Starting 'watch'...
[15:40:47] Finished 'watch' after 200 ms
[15:40:47] Starting 'serve'...
[15:40:47] Finished 'serve' after 29 ms
[BS] [BrowserSync SPA] Running...
[Browsersync] Access URLs:

   Local: http://localhost:3000/
External: http://192.168.1.42:3000/

---

      UI: http://localhost:3001

UI External: http://192.168.1.42:3001

[Browsersync] Serving files from: .tmp/serve
[Browsersync] Serving files from: src

[chris2016]

I had the same.
There is the solution https://github.com/akveo/blur-admin/issues/501

Just change gulp-inject to -> "gulp-inject": "5.0.3" in your package.json