Setting a domain in Heroku and GoDaddy without www prefix

I just purchased a new domain in GoDaddy lets call it example.com. I want to connect this domain to my Heroku app, so I went to the settings in Heroku and under Domains section I added the followings options for my domain:

1. www.example.com
2. example.com

Then, in GoDaddy, under DNS management I created two CNAME records

I used the DNS targets that I got from Heroku for each of the records.The wild card got the DNS target from example.com and the www got the DNS target from www.example.com.

Now, I wanted to test this setup so I tried to use GET request in Postman. I tried http://www.example.com and got 200 and the response I was expecting. However,when I tried http://example.com (without the www prefix) I didn't get any response but an error instead:

Error: write EPROTO 140275225778376:error:10000458:SSL routines:OPENSSL_internal:TLSV1_ALERT_UNRECOGNIZED_NAME:../../third_party/boringssl/src/ssl/tls_record.cc:594:SSL alert number 112

Is this setup that I mention is correct? If I want to support both of the domain with and without the www prefix what is the correct way to set this up?