We don't negotiate RC4, it's broken crypto, so I'm not sure why that error is happening. OTLand is behind CloudFlare, so there isn't much we can do about the CloudFlare<->User TLS connection anyway. You should contact CloudFlare if the error persists as it would be an issue with their service (actually you should just upgrade your OS because you're running an operating system that was released 15 years ago, a lot has happened since...).