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this is an error that introduced by chrome with an update that prevents localhost to communicate with private networks. One fix is
1: go to `<chrome://flags/#block-insecure-private-network-requests>`
2: set *`Block insecure private network requests`* to Disabled

the other fix, and more recommendable is that your site even if it’s a sandbox uses https with certificate

disabling the insecure private network could lead to security issues. in the future netsuite should apply fixes from: <https://developer.chrome.com/blog/private-network-access-update/>

if we want to keep using chrome to develop

Thanks <@U01EU5FT7G8>  i did the same and it is working now