Customer context: The customer encounters a "Certificate chain is incomplete" error message while trying to apply an SSL certificate to their LiveAgent account.
Customer: I see "Certificate chain is incomplete" error message when trying to apply the SSL certificate, what should I do?
Answer: The "Certificate chain is incomplete" error means your certificate is missing intermediate and/or root certificates. Open your certificates with a text editor, then copy and paste the content of each certificate one after another, without empty lines between them. You need to add them sequentially, starting with the end-user ("main") certificate and continuing with the rest.
Typically, SSL issuers or domain hosting providers supply an archive containing all necessary intermediate/root certificates or a combined file called a "CA bundle." If you have not received such a file, check your issuer's/provider's website or contact their support.
Here is a related article: https://support.liveagent.com/751412-LiveAgent-Domain-parking-possible-problems