Melonloader states it works on House Party GOG, but after installing all the dependencies, Melonloader 066, I find Melonloader is not running. This is even without mods. I get an unhandled exception. The game runs fine, but can run no mods. Thanks for any help, or a place to start. Will answer any questions. I'm not sure if anyone plays this game anymore, just hoping someone has insight on the problem.

\Il2CppAssemblyGenerator\Cpp2IL\cpp2il_out...
[16:53:52.807] [Il2CppAssemblyGenerator] Unhandled exception. System.UnauthorizedAccessException: Access to the path 'D:\GOG Games\House Party\MelonLoader\Dependencies\Il2CppAssemblyGenerator\Cpp2IL\cpp2il_out\Unity.AI.Navigation.dll' is denied.
[16:53:52.808] [Il2CppAssemblyGenerator] at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String, FileMode, FileAccess, FileShare, FileOptions)
[16:53:52.809] [Il2CppAssemblyGenerator] at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String, FileMode, FileAccess, FileShare, FileOptions, Int64, Nullable`1 )
[16:53:52.810] [Il2CppAssemblyGenerator] at System.IO.Strategies.OSFileStreamStrategy..ctor(String, FileMode, FileAccess, FileShare, FileOptions, Int64, Nullable`1)
[16:53:52.810] [Il2CppAssemblyGenerator] at System.IO.Strategies.SyncWindowsFileStreamStrategy..ctor(String, FileMode, FileAccess, FileShare, FileOptions, Int64, Nullable`1)
[16:53:52.811] [Il2CppAssemblyGenerator] at System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(String, FileMode, FileAccess, FileShare, FileOptions, Int64, Nullable`1)
[16:53:52.811] [Il2CppAssemblyGenerator] at System.IO.Strategies.FileStreamHelpers.ChooseStrategy(FileStream, String, FileMode, FileAccess, FileShare, Int32, FileOptions, Int64, Nullable`1)
[16:53:52.812] [Il2CppAssemblyGenerator] at System.IO.FileStream..ctor(String, FileMode, FileAccess, FileShare, Int32, FileOptions, Int64)
[16:53:52.812] [Il2CppAssemblyGenerator] at System.IO.FileStream..ctor(String, FileMode, FileAccess, FileShare, Int32, FileOptions)
[16:53:52.813] [Il2CppAssemblyGenerator] at System.IO.FileStream..ctor(String, FileMode, FileAccess, FileShare, Int32, Boolean)
[16:53:52.813] [Il2CppAssemblyGenerator] at System.IO.FileStream..ctor(String, FileMode, FileAccess, FileShare, Int32)
[16:53:52.814] [Il2CppAssemblyGenerator] at System.IO.File.Create(String, Int32)
[16:53:52.814] [Il2CppAssemblyGenerator] at System.IO.File.Create(String)
[16:53:52.814] [Il2CppAssemblyGenerator] at AsmResolver.PE.File.PEFile.Write(String)
[16:53:52.815] [Il2CppAssemblyGenerator] at Cpp2IL.Core.OutputFormats.AsmResolverDllOutputFormat.DoOutput(ApplicationAnalysisContext, String) in C:\Users\Sam\RiderProjects\Cpp2IL\Cpp2IL.Core\OutputFormats\AsmResolverDummyDllOutputFormat.cs:line 51
[16:53:52.815] [Il2CppAssemblyGenerator] at Cpp2IL.Program.MainWithArgs(Cpp2IlRuntimeArgs runtimeArgs) in C:\Users\Sam\RiderProjects\Cpp2IL\Cpp2IL\Program.cs:line 613
[16:53:52.816] [Il2CppAssemblyGenerator] at Cpp2IL.Program.Main(String[] args) in C:\Users\Sam\RiderProjects\Cpp2IL\Cpp2IL\Program.cs:line 525

Discovered AVG Antivirus was the culprit. It gave no warnings for the file removal, Uninstalled AVG, now Melonloader and mods working great!