Hi
Welcome to Centrify Community!
According to the error message, I am suspecting this could be caused by the browser or the machine anti-virus, while all the certificates are stated valid on the machine.
Can you help check your AntiVirus / Firewall program, Eg. Avast, AVG or Bitdefender, make sure you have disabled any option like "Encrypted/SSL scanning or checking"
Hope it helps. Thank you!
BR,
Ivan