Google Chrom web browser login page issue

Dears,
I have ASG version 8.203 software version, When I try to browse through Google Chrome (16.0.912.63) and enter my credential in Astaro login page I receive this error message "Reveived invalid authentication data", please see the attached snapshot
Please note that this error is common to all Google Chrome browsers in the company and this issue does not happen in all other browsers.
This issue started to happen from about 4 days ago.
Please advice.

Attached Images

google chrom login page.jpg (54.6 KB)