cant log in just keeps refreshing on loop

Hello there, Stuart.
 
It appears this is a duplicate post. My colleague has already provided information regarding this matter, which you can access through this link: https://quickbooks.intuit.com/learn-support/en-uk/account-management/cant-log-in-on-laptop-or-ipad-just-sticks-on-landing-page/01/1575557#M8779.
 
Just let me know if you need further assistance by clicking the reply button.