Since 3.97v it was to weak for nowadays purposes. If you have present installation I suggest it to change to at-least 50 characters string. 80 recommended and include special characters.
Trusted hosts and Site address
In 3.97v there is few new settings. If you are missing them you can add them in your
settings/settings.ini.php file under
'site_address' => 'https://demo.livehelperchat.com','trusted_host_patterns' => ['^demo\.livehelperchat\.com$', // Explicit domain'^.+\.livehelperchat\.com$', // Any subdomain],
Location in default configuration
secrethash same situation with
Export hash can be changed in.
System configuration > Live Help configuration > Chat configuration > Misc > Chats export secret hash
Set it to at-least 50 characters length.