CSS breaks when enabled

Good morning .. we have a corporate site that is behind an AWS ELB load balancer. The core site is on an EFS to support multiple front end HTTP servers. All traffic is done via HTTPS at the load balancer, those talk to the local servers via HTTP.

When I setup the CDN, added the domain, keys, the distro was created, however when I enable it, the CSS on the site breaks. I am not sure if it’s an SSL thing, as from the SSL manager, I can add a key/secret, but when I click list certificates, it says processing then nothing. (yes, that IAM user has access to list certificates). I will say that the SSL cert in the certificate manager has a wildcard setup so this is currently being used for staging.domain.com, where the cert is *.domain.com so that could be why its not finding it (but also not sure if that is why).

Any suggestions or help is appreciated.