As an IT professional it's quite common to have to connect to web servers with invalid certificates, for different reasons. For example, opening a management GUI of an appliance may be necessary to change its own certificate or TLS settings.
Problem: sometimes Chrome won't let you open this website, and gives you no "Proceed on" button. Chrome thinks all its users are end users and does not support professionals.
Workaround: there is a hidden feature: you can type "thisisunsafe" blindly into the error page to proceed. Found on Stackoverflow.
Version: tested with Chrome 104