I was also initially not able to link the PR card application to my CIC account having landed on Feb 22,2018. I subsequently called CIC to update my PR card delivery address . After my address was updated, I was able to link the account.
Today got the mail that my CIC page is updated and the application is showing as approved with the comment " Your document is valid."
Today got the mail that my CIC page is updated and the application is showing as approved with the comment " Your document is valid."