Unity 2021.1.0f1 + JetBrains Rider Editor package 3.0.5 = crash after start play mode

Reproduced with removed Unity Test Framework Package

EditorLog

Start importing Packages/com.unity.ide.rider using Guid(ea5aa18a49e4f29d74984ea0ea11a238) Importer(-1,00000000000000000000000000000000) -> (artifact id: '3a2dd082c131ed601f8a2c1a13b365e6') in 0.003058 seconds 
Start importing Packages/com.unity.ide.rider/Rider using Guid(9129183a42052cd43b9c284d6dbd541e) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'ecc694080999800c14d9e149377cedfc') in 0.000363 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor using Guid(1b393f6b29a9ee84c803af1ab4944b71) Importer(-1,00000000000000000000000000000000) -> (artifact id: '0cd7d63e8d8b5422db218cc1eaeda833') in 0.000303 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration using Guid(313cbe17019f1934397f91069831062c) Importer(-1,00000000000000000000000000000000) -> (artifact id: '716756b56e5dec6c3d31094bed48072d') in 0.000302 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Properties using Guid(354fde95fe0643b09509e5fcee350b33) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'e9a5d296f22eed86b2d078cfaf069b92') in 0.000296 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting using Guid(a52391bc44c477f40a547ed4ef3b9560) Importer(-1,00000000000000000000000000000000) -> (artifact id: '00db30284b0eb8c86c3e82dc08f1be4e') in 0.000512 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/PostProcessors using Guid(aa290bd9a165a0543a4bf85ac73914bc) Importer(-1,00000000000000000000000000000000) -> (artifact id: '65c1a9d61e113fa47d59fa2c92003a64') in 0.000324 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Util using Guid(5e726086cd652f82087d59d67d2c24cd) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'c0ed6ad124c2d2df1ee098614758f61f') in 0.000296 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/com.unity.ide.rider.asmdef using Guid(d528c8c98d269ca44a06cd9624a03945) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'b4bf7399ba91ebd0b974db6f1f51b72a') in 0.005565 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/ProjectGeneration.cs using Guid(7078f19173ceac84fb9e29b9f6175201) Importer(-1,00000000000000000000000000000000) -> (artifact id: '75ba27a4d6b81ad4db02c4ef6e19efb3') in 0.008491 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/RiderScriptEditorData.cs using Guid(f079e3afd077fb94fa2bda74d6409499) Importer(-1,00000000000000000000000000000000) -> (artifact id: '0c30fa2f9a5cf7a2b91580a6841a4574') in 0.006619 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/RiderFileSystemWatcher.cs using Guid(f0fa03b1402cfce488be912606bd8de7) Importer(-1,00000000000000000000000000000000) -> (artifact id: '637ca2185a88bfd66a1ae4c13c8e8335') in 0.006837 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting/CallbackData.cs using Guid(010246a07de7cb34185a2a7b1c1fad59) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'c5d021d937207bd1ef1e9053c379705b') in 0.007254 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/LoggingLevel.cs using Guid(71bb46b59a9a7a346bbab1e185c723df) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'e47f8183327d670055bb85e195a0bc45') in 0.006939 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Properties/AssemblyInfo.cs using Guid(8472c6472e6d4301873871a9e8fcf952) Importer(-1,00000000000000000000000000000000) -> (artifact id: '7483b841dee91577a67ab72a809f1f47') in 0.005704 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/RiderScriptEditor.cs using Guid(c4095d72f77fbb64ea39b8b3ca246622) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'e315cf07f793041b15828a0368eafced') in 0.007796 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Util/CommandLineParser.cs using Guid(154ace4bd16de9f4e84052ac257786d6) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'ab1b6e6780061e68bd5b2d8d72ebf4cc') in 0.006938 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/PostProcessors/RiderAssetPostprocessor.cs using Guid(45471ad7b8c1f964da5e3c07d57fbf4f) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'dce8c5ed373599975c0bfc3361323036') in 0.006575 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/RiderInitializer.cs using Guid(f5a0cc9645f0e2d4fb816156dcf3f4dd) Importer(-1,00000000000000000000000000000000) -> (artifact id: '8fe8f29b6a04289174afdd84b24644e8') in 0.007214 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/ProjectPart.cs using Guid(0691c2fe40564a64b3a9b7372c5eca2a) Importer(-1,00000000000000000000000000000000) -> (artifact id: '91270d5bdf89d1d1428a3d8454863afc') in 0.006587 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/AssemblyNameProvider.cs using Guid(56c8c6e437b14f8e9a91e9832c11bc1a) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'ccbe8f65cb3a584575be3239e17fa9f6') in 0.007861 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/FileIOProvider.cs using Guid(a6ba838b1348d5e46a7eaacd1646c1d3) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'e296b131fbf84765a717491e60b45d0d') in 0.006713 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Util/LibcNativeInterop.cs using Guid(071c17858dc6c47ada7b2a1f1ded5402) Importer(-1,00000000000000000000000000000000) -> (artifact id: '3fd4f1a62389592fe0d2e24e13b8a1f0') in 0.005251 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting/SyncTestRunEventsHandler.cs using Guid(48483563a64de3a4e8690122762055f1) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'ad44b9405117d28326bea88c99e4fa00') in 0.007314 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting/TestsCallback.cs using Guid(58aa570dbe0761f43b25ff6c2265bbe2) Importer(-1,00000000000000000000000000000000) -> (artifact id: '4f88fed3f9d82eb8fd01b276dd879f23') in 0.006743 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting/SyncTestRunCallback.cs using Guid(58ab3828fb407c742a48b82bc5983a87) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'e17cd6e18549cf09739df97302dee44c') in 0.007032 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/ProjectGenerationFlag.cs using Guid(78af99d0156944f293b020b49a6830c2) Importer(-1,00000000000000000000000000000000) -> (artifact id: '1feadd652210de532e6e4c8145f20082') in 0.005182 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Util/RiderMenu.cs using Guid(a8860c53ca4073d4f92c403e709c12ba) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'e2c7c183e06a45cca61fe480cd377798') in 0.007147 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/IGenerator.cs using Guid(39cb9ab8a3b2452cbf58ffbea841d203) Importer(-1,00000000000000000000000000000000) -> (artifact id: '9ffb2db4b3e7b11a329019e797550a39') in 0.005362 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting/TestEvent.cs using Guid(f9413c47b3a14a64e8810ce76d1a6032) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'bc84f2af59ef53251ac7540c4907ab73') in 0.006188 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/EditorPluginInterop.cs using Guid(f9bd02a3a916be64c9b47b1305149423) Importer(-1,00000000000000000000000000000000) -> (artifact id: '4fcc964f2232435d1cefc34d1a3e9c1e') in 0.007493 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting/CallbackInitializer.cs using Guid(aa1c6b1a353ab464782fc1e7c051eb02) Importer(-1,00000000000000000000000000000000) -> (artifact id: '7b92924c0e657091aa9e59489453960e') in 0.001895 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Discovery.cs using Guid(dab656c79e1985c40b31faebcda44442) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'cd9ba978a24597adacac0317af81b5c2') in 0.007570 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/IFileIO.cs using Guid(1bdab5b8331b4506bf4eae379235c053) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'd9638a461611decbc4a166550fb1ad0b') in 0.005488 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/PluginSettings.cs using Guid(1bfe12aa306c0c74db4f4f1a1a0ae5ce) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'c80e31c24030004babed5b66cb3b0d2e') in 0.006742 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/UnitTesting/RiderTestRunner.cs using Guid(5c3b27069cb3ddf42ba1260eeefcdd1c) Importer(-1,00000000000000000000000000000000) -> (artifact id: '50ebd68ad70241d7041b8a3faf4ee00f') in 0.007527 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/GUIDProvider.cs using Guid(8cfde1a59fb35574189691a9de1df93b) Importer(-1,00000000000000000000000000000000) -> (artifact id: '07e4b7407e27c30014563263d7a07215') in 0.006206 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/IGUIDGenerator.cs using Guid(8c7e8e301f8b4c30bbf9db502d637f0f) Importer(-1,00000000000000000000000000000000) -> (artifact id: '8776c21156d8e15a8f612a6a4dd132a9') in 0.005863 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Util/RiderPathUtil.cs using Guid(4d34a9510a5b9d21381c93e73867a193) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'e36dacb06469434b916d7212a42222c0') in 0.006607 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Util/FileSystemUtil.cs using Guid(bdbd564a9fdad0b738e76d030cad1204) Importer(-1,00000000000000000000000000000000) -> (artifact id: '2e349e5040e24a070a01e34e8f2e08a8') in 0.006695 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/SolutionGuidGenerator.cs using Guid(3e4e7fdc19414089a0fb43e43b1bdae1) Importer(-1,00000000000000000000000000000000) -> (artifact id: '24db21396f767e020485773d70391bbb') in 0.006697 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/ProjectGeneration/IAssemblyNameProvider.cs using Guid(5eea837708474d7e9c1cb4b2eca0213f) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'bcd8c8ea92ce313b8dcdc0f9e8f3ebda') in 0.005217 seconds 
Start importing Packages/com.unity.ide.rider/Rider/Editor/Util/SerializableVersion.cs using Guid(8e1f00a9be2eb66438e2835fdf1ea11b) Importer(-1,00000000000000000000000000000000) -> (artifact id: '87207d6022a8fab01ba1ebab1588facd') in 0.001816 seconds 

Could not load signature of JetBrains.Rider.Unity.Editor.AfterUnity56.UnitTesting.TestEventsSender:GetTestResult due to: Could not load file or assembly 'nunit.framework, Version=3.5.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb' or one of its dependencies. assembly:nunit.framework, Version=3.5.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb type:<unknown type> member:(null) signature:<none>
Stacktrace:

  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Reflection.MonoMethod.get_IsGenericMethod (System.Reflection.MonoMethod) [0x00026] in <695d1cc93cca45069c528c15c9fdd749>:0
  at System.Reflection.MonoMethod.get_ContainsGenericParameters () [0x00001] in <695d1cc93cca45069c528c15c9fdd749>:0
  at DomainReloadHandler/<>c__1`1<TAttribute_REF>.<GetMethodMembers>b__1_4 (<>f__AnonymousType0`2<System.Type, System.Reflection.MethodInfo>) [0x00000] in D:\Projects\BAG\COLD_DEPTH\ColdDepthSource\Assets\3rdPartyContent\unity-domain-reload-helper-master\Editor\DomainReloadHandler.cs:102
  at System.Linq.Utilities/<>c__DisplayClass1_0`1<TSource_REF>.<CombinePredicates>b__0 (TSource_REF) [0x00007] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
  at System.Linq.Enumerable/WhereSelectEnumerableIterator`2<TSource_REF, TResult_REF>.MoveNext () [0x0003e] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
  at System.Collections.Generic.List`1<T_REF>.InsertRange (int,System.Collections.Generic.IEnumerable`1<T_REF>) [0x000dc] in <695d1cc93cca45069c528c15c9fdd749>:0
  at System.Collections.Generic.List`1<T_REF>.AddRange (System.Collections.Generic.IEnumerable`1<T_REF>) [0x00008] in <695d1cc93cca45069c528c15c9fdd749>:0
  at DomainReloadHandler.GetMethodMembers<TAttribute_REF> (bool) [0x00032] in D:\Projects\BAG\COLD_DEPTH\ColdDepthSource\Assets\3rdPartyContent\unity-domain-reload-helper-master\Editor\DomainReloadHandler.cs:98
  at DomainReloadHandler.OnRuntimeLoad () [0x0023a] in D:\Projects\BAG\COLD_DEPTH\ColdDepthSource\Assets\3rdPartyContent\unity-domain-reload-helper-master\Editor\DomainReloadHandler.cs:72
  at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001f] in <695d1cc93cca45069c528c15c9fdd749>:0