[SOLVED] Error importing mesh

Hi all!  im having a problem with importing a mesh i edited in blender what whatever i do when i try to import it i get this error message:

Sims 4 Studio 1.2.1.5 (Candy Apple)
S4Studio.Blender.Sims4StudioBlenderException: Exception of type 'S4Studio.Blender.Sims4StudioBlenderException' was thrown.
at S4Studio.Blender.BlenderUtilities.RunBlender (System.String script, System.String blend, System.Boolean background, System.Boolean check_version) [0x002cb] in /Users/A/Desktop/S4S/TheS4Studio/S4Studio.Shared/BlenderUtilities.cs:232
at S4Studio.Blender.BlenderUtilities.ImportGeom (System.String custom_blend, System.String custom_geom, System.Int32 body_type, System.String cut) [0x00099] in /Users/A/Desktop/S4S/TheS4Studio/S4Studio.Shared/BlenderUtilities.cs:361
at S4Studio.ViewModels.CAS.CASLODItem.ImportMesh (S4Studio.Blender.BlenderUtilities blender_util, System.String blender_path) [0x0014b] in /Users/A/Desktop/S4S/TheS4Studio/S4Studio.Shared/ViewModels/CAS/CASLODItem.cs:194
at S4Studio.ViewModels.CAS.CASStandalone+<>c__DisplayClass71_0.<ExecuteImportMesh>b__0 () [0x0000d] in /Users/A/Desktop/S4S/TheS4Studio/S4Studio.Shared/ViewModels/CAS/CASStandalone.cs:422
at S4S.UI.Core.S4SWindow+<>c__DisplayClass11_0.<BeginLoading>b__1 () [0x00016] in /Users/A/Desktop/S4S/TheS4Studio/S4Studio.Mac/UI/Core/S4SWindow.cs:168

i've tried showing hidden faces but that wont work, i have only deleted parts of the mesh and haven't added anything. I've tried copying it, saving it in different places but nothing seems to work

this is my first time using blender so i really have no idea what to do. i just downloaded it today so i think i have the newest version.

it also looks like this if that helps

imgur.com/a/zDYfLMZ



If anyone could help me with this it would be greatly appreciated, thanks!


EDIT:

i filled  a hole in the mesh and deleted the layers that i wasn't using and it worked