It appears valid to me and other systems -
https://www.ssllabs.com/ssltest/analyze.html?d=www.pnc.comIt appears similar issues have occurred in the past - https://productforums.google.com/forum/#!topic/chrome/1alZsH... I would recommend double checking to see if you are running the latest version of Chrome and comparing the cert information on other devices to see if your chromebook is displaying old information along with insuring that you are not going through a proxy.
