Import SSL AWS Certificate Manager - Cannot Import more than one certificate

I have a EV certificate for multiple subdomains for my website. The list of domains allowed are:

• cdn.subdomain.mydomain.com
• subdomain-staging.mydomain.com
• subdomain.mydomain.com

I want to use a Cloudfront CDN with a custom CNAME as cdn.subdomain.mydomain.com and the EV ssl certificate. But whenever I am trying to import it in AWS Certificate manager, I am getting the following error.

Can anyone help me?

My certificate is like

-----BEGIN CERTIFICATE-----
//CONTENT Intermediate CA Bundle
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
//CONTENT
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
//CONTENT
-----END CERTIFICATE-----