To access SmartUp via the web, you can use Chrome, Safari or Internet Explorer (IE) 11 and above. Any Internet Explorer versions before IE 11 are not supported.
If you are able to login via the app but not the web, it is likely that your browser is not supported and you should try another one.
If you are unable to login on the app or web, kindly reset your password via Forgot password? as it is likely that your account has been locked due to multiple login attempts.