I tried disabling KTS by going to Settings > Protection > Turned OFF System Watcher > restarted PC but still cannot access emails.
KTS message as follows.
30.03.2019 13.00.47;Dangerous URL blocked;https://webmail.commander.net.au/?_task=mail&_action=list&_refresh=1&_mbox=INBOX&_remote=1&_unlock=loading1553914846763&_=1553914845045;https://webmail.commander.net.au/?_task=mail&_action=list&_refresh=1&_mbox=INBOX&_remote=1&_unlock=loading1553914846763&_=1553914845045;Heuristic Analysis;Google Chrome;03/30/2019 13:00:47