Here is a thread from the US forum. It appears that the issue affects players that havent played for a long time. In this thread you can find both players from EU and US. https://us.forums.blizzard.com/en/hearthstone/t/hsngresult-db-error0/112356/115
the same problem has been going on for the third day, there have been no answers from support for more than a day, the error has still not been fixed, a strange indicator for such a large company as blizzard, people literally cannot log into the game, and there is no help. I have no doubt that there will not be any compensation for this
Can’t login for 3 days straight with this error. Prior to this error I logged in in April, so not that long of a break. Error appears on windows and IPad/Iphone, android phones. Also “DB” probably means “database” so pretty sure that this is server related (and not client related).
Cmon its been 4 days already!!!
So how long to wait? Is this really such a serious problem that it has been impossible to solve for several days now (although I doubt that this problem has existed for several days, I think at least half a year, judging by the forum)?
Wait a minute though. I just tried to log in again, after three days - and lo and behold, it worked !!!
Tried again today and now it worked for me! Thanks