The clientTransferProhibited status usually means the domain is still locked, but it might be caused by something behind the scenes that you can’t control. The Supported domains list includes the .in domain, so that shouldn’t be a problem.
If you’re still not able to transfer in the domain, you could keep the domain with an external registrar and switch to Vercel nameservers to manage DNS records from your Vercel dashboard.
But if you prefer to transfer the domain in then it would be best to open a case to the Customer Success Team so they can investigate and help you get it working.
Thanks! Yeah I just tried transferring into Cloudflare and running into a similar issue so I’m guessing it’s something on Squarespace’s end. Going to reach out to them first and see if I can get it resolved there. Thanks @amyegan!