Install SSL Certificate on load balancer
Go to Load Balancer
Click Change under “SSL Certificate”
Select upload a new SSL Certificate…
a. Give a certificate name
b. In Private key box, copy/paste content from the file <wildcard_authoritiesonline_com_au.key>
c. In Public Key Certificate, copy/paste content from the file <wildcard_authoritiesonline_com_au.crt>
d. In certificate chain, copy/paste content from the file <DigiCertCA.crt>
Click Save
Check Website URL from browser. It should be updated immediately and you should not see any certificate error.