I had been troubled with the 30 days not logging on error since I decided to reinstall the game after a couple of years. For the past 3 days, I searched the forums, internet, and even used Grok to offer solutions.
From what I gleaned, it pointed to the issue regarding a missing ClientSDK folder in the “C:\Users{your username)\AppData\Local\Blizzard Entertainment” folder. So if you just see a Telemetry folder only as I did, here’s the solution that worked for me:
- Created a new admin account for my PC
2 )Logged into Battle.net on the new admin account using same credentials
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Checked the C:\Users(New Admin Account}/AppData\Local\Blizzard Entertainment and copied the ClientSDK folder and pasted it in the Blizzard Entertainment folder of the original admin account.
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Logged into Original Admin account, logged into Battle.net app, started D2R and successfully connected into the game.
*Note in my case, I did not have any previous online nor offline characters since this was a fresh install. I really hope this helps for those frustrated by this issue.