Alexa SSL issue

Hello, i have followed the component configuration for Alexa and I believe that i have got everything set up correctly. When asking Alexa to do something with home assistant i get the following error:

The certificate of the endpoint resource, type [HTTP], Region [Default] does not have a path to a trusted authority. This happens if you are using a self signed certificate.

My certificates are from a trusted authority & a wildcard cert. I have no issue when connecting from a browser.

any help?