I logged into my Google Analytics account today and found all of the data on the homepage blank even if I change the date to a past month where I know data exists. Well, I found a solution to the empty data Google Analytics homepage issue.
Fix Google Analytics Homepage Blank Data Instructions
1. Press on the star icon next to your account name.
2. Now refresh the page. Your data should now display again.
I didn't make any changes to my account, so I'm not sure why I needed to do this, but it works now.