Certificate Authority Error

Getting the following Error on a Peplink Balance 305 with the latest firmware. I cannot log in to my router to make changes to it, have tried from several browsers too.

Site: 192.168.1.* : port
Certificate CN: captive-portal.peplink.com
Certificate Authority: COMODO RSA Domain Validation Secure Server CA
Certificate Validity: Not Before: Nov 18 00:00:00 2014 GMT
Not After: Nov 17 23:59:59 2019 GMT
Certificate Chain: