Safari (ver 17.6) running on iMac 21.5 2017, MS Monterey (ver 12.7.6) Cannot open public websites

"Safari Cannot Open direct.gov because cannot establish a secure connection" using iMac 21.5 - 2017, running MS Monterey ver 12.7.6, Safari ver 17.6. But Google Chrome can open it on this iMac!!! What's the problem?

[Edited by Moderator]