Hostname/IP does not match certificate's altnames

Question

Yesterday I started getting error like when calling my REST API  
Hostname/IP does not match certificate's altnames. Host: my-domain.com is not in the cert's altnames: DNS:*.execute-api.us-east-1.amazonaws.com  
  
I definitely didn't change anything. Did anything change on AWS side? Why did I suddenly start getting error. Also the thing is some request succeed and some fail, so not sure

Answer

Hello:  
  
You mention that your API is REST, but are you also using this domain for a new HTTP API?  
  
Can you send me your account id and domain name (as a private message) and I can confirm with the team if there's an ongoing issue.  
  
Regards,  
Bob

Answer

I'm having this same issue.  
This occurs only when I am trying to post/get to sandbox.  
https://sandbox.sellingpartnerapi-na.amazon.com/vendor/directFulfillment/shipping/v1/shippingLabels/2JK3S9VC  
  
These calls were working last week. I know that someone updated something with the vendor API java classes we use, but this is working with the product API URL, plus there are unit tests that ARE succeeding when pointing to sandbox.

Hostname/IP does not match certificate's altnames

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