CORS header Browsersync issue

[strarsis]

Some other devs and me also had this issue for some time,
a workaround finally fixed it for me, see this discussion:

Sage 9 + BrowserSync not loading any CSS at all on 'yarn run start'

@Simeon: Edit: According to author BrowserSync has to be configured with advanced key: new BrowserSyncPlugin({ target, open: config.open, proxyUrl: config.proxyUrl, watch: config.watch, delay: 500, advanced: { browserSync: { cors: true, }, }, }), Related issues: