Error Message in Sims 4 Studio

I just recently downloaded sims 4 studio, and whenever I try to make poses I get this error: 
Sims 4 Studio 1.3.1.5 (Apple Blossom)
System.UnauthorizedAccessException: Access to the path "/Library/WebServer/share/httpd/manual/programs/poses.package" 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) [0x00259] in /Library/Frameworks/Xamarin.Mac.framework/Versions/Current/src/Xamarin.Mac/mcs/class/corlib/System.IO/FileStream.cs:274
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 /Library/Frameworks/Xamarin.Mac.framework/Versions/Current/src/Xamarin.Mac/mcs/class/corlib/System.IO/FileStream.cs:106
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 /Library/Frameworks/Xamarin.Mac.framework/Versions/Current/src/Xamarin.Mac/external/corefx/src/System.IO.FileSystem/src/System/IO/FileSystem.Unix.cs:55
at System.IO.File.Copy (System.String sourceFileName, System.String destFileName, System.Boolean overwrite) [0x00056] in /Library/Frameworks/Xamarin.Mac.framework/Versions/Current/src/Xamarin.Mac/external/corefx/src/System.IO.FileSystem/src/System/IO/File.cs:74
at S4Studio.Data.IO.Package.DBPFPackage.Save (System.String out_file, System.Boolean inline, System.String temp_path) [0x001ca] in /Users/a/thes4studio/TheS4Studio/S4Studio.Shared/IO/Package/DBPFPackage.cs:386
at S4Studio.Shared.FeatureViewModel+<>c__DisplayClass28_0.<CreateItem>b__0 () [0x0002b] in /Users/a/thes4studio/TheS4Studio/S4Studio.Shared/ViewModels/App/Features/FeatureViewModel.cs:97
at S4S.UI.Core.S4SWindow+<>c__DisplayClass11_0.<BeginLoading>b__1 () [0x00016] in /Users/a/thes4studio/TheS4Studio/S4Studio.Mac/UI/Core/S4SWindow.cs:171

Can someone help? Thanks