Blizzard servers could not be reached or may be offline.
What to do if you are stuck in a login loop after launching Overwatch 2
Options to link Battle.net and Steam
There was a server-side issue downloading a required file.
Information on the deletion, transfer, unlinking, or moving accounts.
When a Boku payment does not go through after waiting 24 hours
Before you can connect to the game servers, you must add a phone number to this account.
Troubleshooting steps to help you connect to Overwatch 2