Struggling with exporting (Volume/Blender path denied)

As explained in the title, I'm struggling to export a mesh in S4S. 

I have used multiple different versions, including aurora and apple blossom with no luck.

heres is the error message.

Aurora Error
Sims 4 Studio 1.4.1.1 (Aurora)
System.UnauthorizedAccessException: Access to the path "/Volumes/Blender/Blender/blender.app/mesh.blend" is denied.
at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) [0x001b7] in <b8c00558782e4220b48bd7fc0dc6eca8>:0
at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.IO.FileOptions options) [0x00000] in <b8c00558782e4220b48bd7fc0dc6eca8>:0
at (wrapper remoting-invoke-with-check) System.IO.FileStream..ctor(string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare,int,System.IO.FileOptions)
at System.IO.FileSystem.CopyFile (System.String sourceFullPath, System.String destFullPath, System.Boolean overwrite) [0x00035] in <b8c00558782e4220b48bd7fc0dc6eca8>:0
at System.IO.File.Copy (System.String sourceFileName, System.String destFileName, System.Boolean overwrite) [0x00062] in <b8c00558782e4220b48bd7fc0dc6eca8>:0
at S4Studio.ViewModels.CAS.CASLODItem.ExportMesh (S4Studio.Blender.BlenderUtilities blender_util, System.String blender_path) [0x002bf] in <618d2d56b6b84107a65659745d61d886>:0
at S4Studio.ViewModels.CAS.CASStandalone+<>c__DisplayClass79_0.<ExecuteExportMesh>b__0 () [0x00027] in <618d2d56b6b84107a65659745d61d886>:0
at S4S.UI.Core.S4SWindow+<>c__DisplayClass17_0.<BeginLoading>b__1 () [0x00014] in <618d2d56b6b84107a65659745d61d886>:0

Apple Blossom Error
Sims 4 Studio 1.3.4.2 (Apple Blossom)
System.UnauthorizedAccessException: Access to the path "/Volumes/Blender/Blender/blender.app/tester.blend" is denied.
at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) [0x0019e] in <7628b25c71af42df8d610de3aafc8b41>:0
at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.IO.FileOptions options) [0x00000] in <7628b25c71af42df8d610de3aafc8b41>:0
at (wrapper remoting-invoke-with-check) System.IO.FileStream..ctor(string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare,int,System.IO.FileOptions)
at System.IO.FileSystem.CopyFile (System.String sourceFullPath, System.String destFullPath, System.Boolean overwrite) [0x00035] in <7628b25c71af42df8d610de3aafc8b41>:0
at System.IO.File.Copy (System.String sourceFileName, System.String destFileName, System.Boolean overwrite) [0x00062] in <7628b25c71af42df8d610de3aafc8b41>:0
at S4Studio.ViewModels.CAS.CASLODItem.ExportMesh (S4Studio.Blender.BlenderUtilities blender_util, System.String blender_path) [0x00274] in <6f064ec3ebe048448397ea60b2ecded2>:0
at S4Studio.ViewModels.CAS.CASStandalone+<>c__DisplayClass74_0.<ExecuteExportMesh>b__0 () [0x00027] in <6f064ec3ebe048448397ea60b2ecded2>:0
at S4S.UI.Core.S4SWindow+<>c__DisplayClass11_0.<BeginLoading>b__1 () [0x00014] in <6f064ec3ebe048448397ea60b2ecded2>:0


Apologies if this is not the appropriate thread or area, I'm not used to forums and couldnt find an option to reply to the existing help forums.