Why does the QuickBooks Online login page keep refreshing?

https://quickbookhelpdesk.com/blog/how-to-fix-quickbooks-online-login-issues/

This is commonly caused by browser cache, extensions, outdated browsers, or unstable internet connections. QuickBooks Online login issues can be frustrating, but they are usually caused by browser settings, cached data, internet connectivity, incorrect credentials, or temporary service interruptions rather than problems with your financial data. Fortunately, most users can restore access by checking their login information, clearing browser cache, updating the browser, verifying their internet connection, and reviewing browser extensions.