Cannot attach SSL certificate got form Let's Encrypt
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I have got my SSL certificate from Let's Encrpyt. I have uploaded it to the ACM and am able to see my domain there. I have uploaded it to the CloudFront and while adding the Alternative domain name am getting
this error "The certificate that is attached to your distribution was not issued by a trusted Certificate Authority"
These are the documentations for the trusted ssl providers by Amazon, My domain has been issued by the Let's Encrypt ( E1 ). While checking the above documentation if my issuer is trusted , Let's encrypt is not given in Certificate Issuer Organization , but "Internet Security Research Group" this organization has its website name as https://letsencrypt.org/ .
To eloborate ,the organization "Internet Security Research Group" in the column Certificate Issuer Organization has ** https://letsencrypt.org/** in the Company Website column
Am super confused , is Let's Encrypt authorized by AWS or am I missing anything ?