The comment section of the mod suggests there's no issue using the 1.4 version in 1.5 game. I identified a red error message entering the game as following.

Error in static constructor of BiomesKit.ErrorLogs: System.TypeInitializationException: The type initializer for 'BiomesKit.ErrorLogs' threw an exception. ---> System.MissingMethodException: void Verse.Log.Warning(string,bool)
--- End of inner exception stack trace ---
[Ref 22673051] Duplicate stacktrace, see ref for original
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch7 (string)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.StaticConstructorOnStartupUtility.CallAll_Patch2 ()
Verse.PlayDataLoader/<>c:<DoPlayLoad>b__4_4 ()
Verse.LongEventHandler:ExecuteToExecuteWhenFinished ()
Verse.LongEventHandler:UpdateCurrentAsynchronousEvent ()
Verse.LongEventHandler:LongEventsUpdate (bool&)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Root.Update_Patch1 (Verse.Root)
Verse.Root_Entry:Update ()

It doesn't look like to trigger any issues in-game, but I still want to report it here. The comments section has a length restriction that I have to post this discussion.