Whitelist Error when using valid namespaces

[yuberee]

Describe the bug

While only `using System, Sandbox, and Collections.Generic namespaces, we get this error:

Whitelist Error: One or more errors occurred. (Object reference not set to an instance of an object.)
   at System.Threading.Tasks.TaskReplicator.Run[TState](ReplicatableUserAction`1 action, ParallelOptions options, Boolean stopOnFirstFailure)
   at System.Threading.Tasks.Parallel.ForWorker[TLocal,TInt](TInt fromInclusive, TInt toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally)
--- End of stack trace from previous location ---
   at System.Threading.Tasks.Parallel.ForWorker[TLocal,TInt](TInt fromInclusive, TInt toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally)
   at Sandbox.AccessControl.TestType(TypeDefinition type) in C:\build\_work\sbox\sbox\engine\Sandbox.Access\AccessControl.cs:line 283
   at Sandbox.AccessControl.TestTypeInThread(TypeDefinition type) in C:\build\_work\sbox\sbox\engine\Sandbox.Access\AccessControl.cs:line 239
   at Sandbox.PackageLoader.TestAccessControl(Stream dll, TrustedBinaryStream& trustedDll) in C:\build\_work\sbox\sbox\engine\Sandbox.Engine\Assets\PackageManager\PackageLoader.cs:line 107
   at Sandbox.PackageLoader.LoadAssemblyFromPackage(ActivePackage ap, String filename, Byte[] bytes) in C:\build\_work\sbox\sbox\engine\Sandbox.Engine\Assets\PackageManager\PackageLoader.cs:line 261
   at Sandbox.PackageLoader.LoadPendingChanges() in C:\build\_work\sbox\sbox\engine\Sandbox.Engine\Assets\PackageManager\PackageLoader.cs:line 156
   at Sandbox.PackageLoader.Tick() in C:\build\_work\sbox\sbox\engine\Sandbox.Engine\Assets\PackageManager\PackageLoader.cs:line 727
   at Sandbox.GameInstanceDll.Tick() in C:\build\_work\sbox\sbox\engine\Sandbox.GameInstance\GameInstanceDll.cs:line 288
   at Sandbox.EngineLoop.FrameStart() in C:\build\_work\sbox\sbox\engine\Sandbox.Engine\EngineLoop.cs:line 158
   at Sandbox.EngineLoop.RunFrame(CMaterialSystem2AppSystemDict appDict, Boolean& wantsQuit) in C:\build\_work\sbox\sbox\engine\Sandbox.Engine\EngineLoop.cs:line 36
   at Sandbox.AppSystem.Run() in C:\build\_work\sbox\sbox\engine\Sandbox.AppSystem\AppSystem.cs:line 85
   at Sandbox.Launcher.Main() in C:\build\_work\sbox\sbox\engine\Launcher\SboxDev\Launcher.cs:line 24
   at Sandbox.Program.Launch() in C:\build\_work\sbox\sbox\engine\Launcher\Shared\Startup.cs:line 21
   at Sandbox.Program.Main() in C:\build\_work\sbox\sbox\engine\Launcher\Shared\Startup.cs:line 16

Which seems to originate here: https://github.com/Small-Fish-Dev/boxfish/blob/main/code/Base/Chunk.cs

To Reproduce

1. Clone https://github.com/Small-Fish-Dev/boxfish/
2. Attempt to compile

Expected behavior

.

Media/Files

No response

Additional context

No response

[yuberee]

Replaced by #7350