Unity.CollabProxy.Editor causing ReflectionTypeLoadException

Hey all, Unity Collaborate appears to be causing issues with assembly parsing.

Since upgrading to 2021.1.4f1 (upgraded from 2020), I've been getting this error log when I enter play-mode:

Code (CSharp):

1. ReflectionTypeLoadException: Exception of type 'System.Reflection.ReflectionTypeLoadException' was thrown.
2. System.Reflection.Assembly.GetTypes () (at <695d1cc93cca45069c528c15c9fdd749>:0)
3. Unity.XR.OpenVR.OpenVRHelpers+<>c.<GetType>b__2_4 (System.Reflection.Assembly assembly) (at Library/PackageCache/com.valvesoftware.unity.openvr@01128f4e36ed-1614121125000/Runtime/OpenVRHelpers.cs:35)
4. System.Linq.Enumerable+<SelectManyIterator>d__167`3[TSource,TCollection,TResult].MoveNext () (at <351e49e2a5bf4fd6beabb458ce2255f3>:0)
5. System.Linq.Enumerable+WhereSelectEnumerableIterator`2[TSource,TResult].MoveNext () (at <351e49e2a5bf4fd6beabb458ce2255f3>:0)
6. System.Linq.Enumerable.TryGetFirst[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Boolean& found) (at <351e49e2a5bf4fd6beabb458ce2255f3>:0)
7. System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source) (at <351e49e2a5bf4fd6beabb458ce2255f3>:0)
8. Unity.XR.OpenVR.OpenVRHelpers.GetType (System.String className, System.Boolean fullname) (at Library/PackageCache/com.valvesoftware.unity.openvr@01128f4e36ed-1614121125000/Runtime/OpenVRHelpers.cs:34)
9. Unity.XR.OpenVR.OpenVRHelpers.DoesTypeExist (System.String className, System.Boolean fullname) (at Library/PackageCache/com.valvesoftware.unity.openvr@01128f4e36ed-1614121125000/Runtime/OpenVRHelpers.cs:19)
10. Unity.XR.OpenVR.OpenVRHelpers.IsUsingSteamVRInput () (at Library/PackageCache/com.valvesoftware.unity.openvr@01128f4e36ed-1614121125000/Runtime/OpenVRHelpers.cs:14)
11. Unity.XR.OpenVR.OpenVRLoader.Initialize () (at Library/PackageCache/com.valvesoftware.unity.openvr@01128f4e36ed-1614121125000/Runtime/OpenVRLoader.cs:175)
12. UnityEngine.XR.Management.XRManagerSettings.InitializeLoaderSync () (at Library/PackageCache/com.unity.xr.management@4.0.1/Runtime/XRManagerSettings.cs:187)
13. UnityEngine.XR.Management.XRGeneralSettings.InitXRSDK () (at Library/PackageCache/com.unity.xr.management@4.0.1/Runtime/XRGeneralSettings.cs:175)
14. UnityEngine.XR.Management.XRGeneralSettings.AttemptInitializeXRSDKOnLoad () (at Library/PackageCache/com.unity.xr.management@4.0.1/Runtime/XRGeneralSettings.cs:148)

I created a quick class to debug this:

Code (CSharp):

1. using System;
2. using UnityEditor;
3. using UnityEngine;
4.  
5. namespace TrollKing.Windows
6. {
7.     public static class TestClassFailure
8.     {
9.         [MenuItem("TrollKing/Debug fail")]
10.         public static void VerifyAssemblyTypes()
11.         {
12.             try
13.             {
14.                 bool success = GetTypeCheck("SteamVR_Input") != null;
15.             }
16.             catch (Exception e)
17.             {
18.                 Debug.LogError(e);
19.             }
20.         }
21.  
22.         public static Type GetTypeCheck(string className)
23.         {
24.             var assPile = AppDomain.CurrentDomain.GetAssemblies();
25.             foreach (var ass in assPile)
26.             {
27.                 try
28.                 {
29.                     var assTypes = ass.GetTypes();
30.                     foreach (var assT in assTypes)
31.                     {
32.                         if (assT.Name == className)
33.                         {
34.                             return assT;
35.                         }
36.                     }
37.                 }
38.                 catch (Exception e)
39.                 {
40.                     Debug.LogError($"Failed to get assembly types for {ass} " + e);
41.                 }
42.             }
43.  
44.             return null;
45.         }
46.     }
47. }

With that, I was able to verify that the issue lies in this "Unity.CollabProxy.Editor" assembly.

Code (csharp):

1.  
2.  
3. Failed to get assembly types for Unity.CollabProxy.Editor, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null System.Reflection.ReflectionTypeLoadException: Exception of type 'System.Reflection.ReflectionTypeLoadException' was thrown.
4.   at (wrapper managed-to-native) System.Reflection.Assembly.GetTypes(System.Reflection.Assembly,bool)
5.   at System.Reflection.Assembly.GetTypes () [0x00000] in <695d1cc93cca45069c528c15c9fdd749>:0
6.   at TrollKing.Windows.TestClassFailure.GetTypeCheck (System.String className) [0x00019] in C:\game_projects\VoxelMage\Assets\Editor\Windows\TestClassFailure.cs:29
7. UnityEngine.Debug:LogError (object)
8. TrollKing.Windows.TestClassFailure:GetTypeCheck (string) (at Assets/Editor/Windows/TestClassFailure.cs:40)
9. TrollKing.Windows.TestClassFailure:VerifyAssemblyTypes () (at Assets/Editor/Windows/TestClassFailure.cs:14)
10.  

Removing the "Unity Collaborate" package from Package Manager appears to remove the errors.