After making DNS updates at your domain’s DNS provider, it can take several hours for DNS to update fully (DNS propagation).
In the meantime, if you have set A records for your root domain and a CNAME www record, then make sure the www is set as the default.
(Set a default domain | Webflow University)
Then republish your project to the www.
Note that web browsers have caching also, so sometimes it can help to check again in an incognito browser window after any updates.
If any further issues, please reach out to Webflow support team.
In Chrome, this error usually comes with the 101 code, while on Firefox, Internet Explorer, etc. the display message of this error is “The connection was reset,” indicating the same connection problem. See the steps on how to fix the “ERR_CONNECTION_RESET” error here How to Fix ERR_CONNECTION_RESET Error