Worker is returning error

Added a simple hello world handler on a URL

But It is returning this error in Postman:
Error: write EPROTO 5083357352:error:10000410:SSL routines:OPENSSL_internal:SSLV3_ALERT_HANDSHAKE_FAILURE:…/…/third_party/boringssl/src/ssl/tls_record.cc:594:SSL alert number 40 5083357352:error:1000009a:SSL routines:OPENSSL_internal:HANDSHAKE_FAILURE_ON_CLIENT_HELLO:…/…/third_party/boringssl/src/ssl/handshake.cc:604:

And this error in chrome:
ERR_SSL_VERSION_OR_CIPHER_MISMATCH

What’s the domain?

empty-morning-a30a.cbdou.workers.dev/

https