# Browsersync stuck loading when proxying Trellis local dev site

**URL:** https://discourse.roots.io/t/browsersync-stuck-loading-when-proxying-trellis-local-dev-site/20411
**Category:** trellis
**Created:** 2021-03-23T14:36:29Z
**Posts:** 4
**Showing post:** 2 of 4

## Post 2 by @strarsis — 2021-03-25T00:12:30Z

I also encountered an CORS-related BrowserSync issue in the past - could this help you?:

> [@Sage 9 + BrowserSync not loading any CSS at all on 'yarn run start'](https://discourse.roots.io/t/sage-9-browsersync-not-loading-any-css-at-all-on-yarn-run-start/11332/26):
>
> @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:

What Sage theme version are you using? If you are using Sage 9 you may find the Sage 9.x update branch interesting which fixes a ton of build/watch issues:  
[https://discourse.roots.io/t/sage-9-1-please-test/20067?u=strarsis](https://discourse.roots.io/t/sage-9-1-please-test/20067)

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