i have the same issue, i have tried everything :´(
C:\Program Files (x86)\Hearthstone\Logs
2021-08-09 12:10:24.658: Logging Unity output to: Logs/hearthstone_2021_08_09_12_10_24.log
2021-08-09 12:10:24.714: Current working dir=C:\Program Files (x86)\Hearthstone
2021-08-09 12:10:25.143: [Downloader] Retrieved deeplink:
2021-08-09 12:10:25.173: Error loading config file client.config
2021-08-09 12:10:25.758: Error.AddDevWarning() - header=GameStrings Error message=GameStringTable.Load() - There are no entries for category GLOBAL - path: .
2021-08-09 12:10:25.759: GameStrings.LoadCategory() - GLOBAL failed to load
2021-08-09 12:10:25.759: Error.AddDevWarningNonRepeating() - header=GameStrings Error message=GameStringTable.Load() - There are no entries for category GLUE - path: .
2021-08-09 12:10:25.760: GameStrings.LoadCategory() - GLUE failed to load
2021-08-09 12:10:25.899: Error loading config file client.config
2021-08-09 12:10:25.899: Failed to load config file:
2021-08-09 12:10:25.934: Command Line: -launch -uid hs_beta
2021-08-09 12:10:25.945: UberText LoadCachedData() failed: The output char buffer is too small to contain the decoded characters, encoding ‘Unicode (UTF-8)’ fallback ‘System.Text.DecoderReplacementFallback’.
Parameter name: chars
2021-08-09 12:10:26.029: [ExceptionReporter] Version 1.1.3
2021-08-09 12:10:26.030: [ExceptionReporter] ScreenshotPath: C:/Users/Juan Luis/AppData/LocalLow/Blizzard Entertainment/Hearthstone\Screenshot.png
2021-08-09 12:10:26.032: [ExceptionReporter] User UUID: b2d4ac685a60a0d81aee1bce8c80253b79e7a179