System.NotSupportedException: Unknown color scheme 'DarkBackground'

[coding-musicman]

In Win 11, I've SMAPI from 4.5.0 to 4.5.1 and I get:

SMAPI failed to initialize: System.NotSupportedException: Unknown color scheme 'DarkBackground'.
at StardewModdingAPI.Internal.ConsoleWriting.ColorfulConsoleWriter.GetConsoleColorScheme(Platform platform, MonitorColorScheme colorSchemeId, Dictionary2 colorConfig) in /home/runner/work/SMAPI/SMAPI/src/SMAPI.Internal/ConsoleWriting/ColorfulConsoleWriter.cs:line 150 at StardewModdingAPI.Internal.ConsoleWriting.ColorfulConsoleWriter.SetColors(MonitorColorScheme colorSchemeId, Dictionary2 colorSchemes) in /home/runner/work/SMAPI/SMAPI/src/SMAPI.Internal/ConsoleWriting/ColorfulConsoleWriter.cs:line 56
at StardewModdingAPI.Framework.Logging.LogManager..ctor(String logPath, MonitorColorScheme colorSchemeId, Dictionary2 colorConfig, Boolean writeToConsole, HashSet1 verboseLogging, Boolean isDeveloperMode, Func1 getScreenIdForLog) in /home/runner/work/SMAPI/SMAPI/src/SMAPI/Framework/Logging/LogManager.cs:line 65 at StardewModdingAPI.Framework.SCore..ctor(String modsPath, Boolean writeToConsole, Nullable1 overrideDeveloperMode) in /home/runner/work/SMAPI/SMAPI/src/SMAPI/Framework/SCore.cs:line 203
at StardewModdingAPI.Program.Start(String[] args) in /home/runner/work/SMAPI/SMAPI/src/SMAPI/Program.cs:line 232
at StardewModdingAPI.Program.Main(String[] args) in /home/runner/work/SMAPI/SMAPI/src/SMAPI/Program.cs:line 45
Game has ended. Press any key to exit.

When I downgrade to 4.5.0 the error is gone.