White block at the bottom of the screen

I understand your time is valuable. That empty white block is caused by a browser cache conflict, or an incomplete page load. To fix this, try using a private browsing session or incognito and log into QBO. Using an Incognito window provides a fresh, clean session. 

Alternatively, you can use other browser troubleshooting methods.

Please let me know what you find out so I can help you further.