​
Builder isn’t loading in Safari

If you’re using Safari and the builder isn’t loading, it’s likely that you’re running into issues with mixed content. Safari blocks the loading of all mixed-content resources. This means that https://app.makeswift.com, which is loaded via HTTPS, can’t load http://localhost:3000, since it is loaded via HTTP. The solution to this issue is to run your local Next.js app with HTTPS. You can do this in Next.js with the following command: 
next dev --experimental-https
The --experimental-https flag requires a Next.js version of 13.5.1 or higher.
For full details, see their How can I run Next.js on localhost through HTTPS? guide.

​
Builder isn’t loading in Brave Browser

If you’re using Brave and the builder isn’t loading, it’s likely you’re running into issues with Brave Shields and its restrictions on localhost. Since the #463 release, Brave blocks requests to localhost from non-localhost documents. To solve this issue, go to brave://adblock and add the following custom filter: 
@@||localhost^$domain=app.makeswift.com
This prevents Brave Shields from blocking localhost requests from app.makeswift.com.