Zwift won't open past 'let's go' page

Hi, Just started using Zwift and did my first FTP test on Thursday with no problems. Went to use yesterday and it logs into my home page which gives option to change user and ‘let’s go’. I click 'let’s go and it starts to load then goes back to the home page. I’ve tried uninstalling, reinstalling, windows updates, changing active x and java script settings. Losing the will to live with it. Any help massively appreciated!!! Cheers, Dave