Every time there's a new patch or a big season update since Season 3 came out, I've been having the same issue with no clear fix. I've tried a DNS flush, file repair, uninstalling and reinstalling, letting it through firewall/antivirus, and it just seems like it won't let me in this time. Some of these worked in the past, but won't work now.
I've heard it's a version mismatch issue for most people, and I've put in tickets for it to no avail. Does anyone have a way to get the most up-to-date version to download? I don't want to have to keep doing random things until it decides to work again. I really looked forward to coming home from work to check out the new battlepass. 🙁
Edit: I'd also like to mention that I have never had this issue with any other platform, only Battlenet and their games.
https://i.redd.it/sg12ds58zsih1.png
Source: r/Overwatch · by /u/Nadamari