You were disconnected from Battle.net in Diablo II
Common ProblemsError: "You were disconnected from Battle.net. Please Reconnect."
This error may occur when trying connect to Battle.net after a fresh Diablo II install. To fix this problem, close the game, right-click on the Diablo II icon, then select Run as administrator.
Alternatively, download and run the latest patch here to update Diablo II to the latest version manually.
If the issue persists, you may have a temporary restriction.