Hey,
I’ve been seeing this a lot lately. Does the app also give you a past date off to the right of the button? If yes the most common fix has been to resync Windows time.
- Right-click the system click
- Select adjust date/time
- Slide the bars for time/timezone automation to the left, then back right
- Click “Sync Now”
Please ensure the Battle.net app is closed fully before doing this. Using task manager to double check it’s fully closed would be ideal. Make sure to use the full expanded view of task manager vs the smaller one which may not display background processes.
Let us know how things go. Cheers!
Edit:
While we can of course still help out on this forum, troubleshooting for the Battle.net desktop app is best provided through the Desktop App Tech Support forum. This classic games forum is more for our oldschool games like Diablo 2 and similar.