Build Error: Witout `from` option PostCSS could generate wrong

[sharonyue]

2018-02-26T03:00:31.355Z [21693] - info: [build] Building in parallel mode
2018-02-26T03:00:31.358Z [21693] - info: [build]         plugin static dirs  build started
2018-02-26T03:00:31.363Z [21693] - info: [build]          requirejs modules  build started
2018-02-26T03:00:31.365Z [21693] - info: [build]           client js bundle  build started
2018-02-26T03:00:31.367Z [21693] - info: [build]            admin js bundle  build started
2018-02-26T03:00:31.367Z [21693] - info: [build]         client side styles  build started
2018-02-26T03:00:31.368Z [21693] - info: [build] admin control panel styles  build started
2018-02-26T03:00:31.370Z [21693] - info: [build]                  templates  build started
2018-02-26T03:00:31.371Z [21693] - info: [build]                  languages  build started
2018-02-26T03:00:31.372Z [21693] - info: [build]                     sounds  build started
2018-02-26T03:00:40.698Z [21693] - info: [build]           client js bundle  build completed in 9.334sec
2018-02-26T03:00:40.698Z [21693] - info: [build]            admin js bundle  build completed in 9.331sec
2018-02-26T03:00:40.869Z [21693] - info: [build]                     sounds  build completed in 9.497sec
2018-02-26T03:00:41.498Z [21693] - info: [build]         plugin static dirs  build completed in 10.14sec
Witout `from` option PostCSS could generate wrong source map or do not find Browserslist config. Set it to CSS file path or to `undefined` to prevent this warning
2018-02-26T03:00:54.973Z [21693] - info: [build]         client side styles  build completed in 23.606sec
2018-02-26T03:00:55.041Z [21693] - info: [build] admin control panel styles  build completed in 23.673sec
2018-02-26T03:00:55.075Z [21693] - info: [build]          requirejs modules  build completed in 23.713sec
2018-02-26T03:01:00.042Z [21693] - info: [build]                  languages  build completed in 28.671sec
2018-02-26T03:01:00.051Z [21693] - info: [build]                  templates  build completed in 28.681sec
2018-02-26T03:01:00.053Z [21693] - info: [build] Asset compilation successful. Completed in 28.695sec.

What does it mean?

[PitaJ]

It's just a warning that you can safely ignore.

[fais3000]

@pitaj What about this warning on 1.7.5?

2018-02-26T07:16:54.242Z [21303] - warn: [plugins/load] The following plugins may not be compatible with your version of NodeBB. This may cause unintended behaviour or crashing. In the event of an unresponsive NodeBB caused by this plugin, run ./nodebb reset -p PLUGINNAME to disable it.

• nodebb-plugin-composer-default

[PitaJ]

@fais3000 that's also safe to ignore