Unity fails to build game for Android when Signal R is included in project

Hello,
I am using Unity 2018.4.30f1 for building mobile game for iOS and Android. Recently, I needed to use Signal R to implement a chat. Downloading NuGet and placing dll files in project gives me errors when trying to build for Android.
Error 1:
Failed running C:\Program Files\Unity_2018.4.30f1\Editor\Data\il2cpp/build/il2cpp.exe --convert-to-cpp --emit-null-checks --enable-array-bounds-check --dotnetprofile="unityaot" --compile-cpp --libil2cpp-static --platform="Android" --architecture="ARMv7" --configuration="Release" --outputpath="C:\Users\nansi.uzunova\source\repos\Siege\b17\unity_project\Temp\StagingArea\assets\bin\Data\Native\armeabi-v7a\libil2cpp.so" --cachedirectory="C:\Users\nansi.uzunova\source\repos\Siege\b17\unity_project\Assets\..\Library\il2cpp_android_armeabi-v7a/il2cpp_cache" --additional-include-directories="C:\Program Files\Unity_2018.4.30f1\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\bdwgc/include" --additional-include-directories="C:\Program Files\Unity_2018.4.30f1\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\libil2cpp/include" --tool-chain-path="C:/Users/nansi.uzunova/android ndk/android-ndk-r16b" --map-file-parser="C:\Program Files\Unity_2018.4.30f1\Editor\Data\Tools\MapFileParser\MapFileParser.exe" --directory="C:\Users\nansi.uzunova\source\repos\Siege\b17\unity_project\Temp\StagingArea\assets\bin\Data\Managed" --generatedcppdir="C:\Users\nansi.uzunova\source\repos\Siege\b17\unity_project\Temp\StagingArea\Il2Cpp\il2cppOutput"
stdout:
IL2CPP error for method 'System.Void modreq(System.Runtime.CompilerServices.IsExternalInit) System.Text.Json.Serialization.Metadata.JsonParameterInfoValues::set_Name(System.String)' in assembly 'C:\Users\nansi.uzunova\source\repos\Siege\b17\unity_project\Temp\StagingArea\assets\bin\Data\Managed\System.Text.Json.dll'
Additional information: Stack empty.
il2cpp.exe didn't catch exception: System.InvalidOperationException: Stack empty.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.Stack`1.Pop()
at Unity.IL2CPP.StackAnalysis.StackStateBuilder.Build(IEnumerable`1 instructions)
at Unity.IL2CPP.StackAnalysis.StackAnalysis.Analyze()
at Unity.IL2CPP.MethodBodyWriter..ctor(IGeneratedMethodCodeWriter writer, MethodReference methodReference, TypeResolver typeResolver, IRuntimeMetadataAccess metadataAccess, VTableBuilder vTableBuilder, MethodBodyWriterDebugOptions options, ISourceAnnotationWriter sourceAnnotationWriter)
at Unity.IL2CPP.MethodWriter.WriteMethodBody(MethodReference method, IGeneratedMethodCodeWriter methodBodyWriter, IRuntimeMetadataAccess metadataAccess, ISourceAnnotationWriter sourceAnnotationWriter, IIcallMappingService icallMapping, VTableBuilder vtableBuilder)
at Unity.IL2CPP.MethodWriter.<>c__DisplayClass0_0.<WriteMethodDefinition>b__0(IGeneratedMethodCodeWriter bodyWriter, IRuntimeMetadataAccess metadataAccess)
at Unity.IL2CPP.CodeWriterExtensions.WriteMethodWithMetadataInitialization(IGeneratedMethodCodeWriter writer, String methodSignature, String methodFullName, Action`2 writeMethodBody, String uniqueIdentifier, MethodReference methodRef)
at Unity.IL2CPP.MethodWriter.WriteMethodDefinition(IGeneratedMethodCodeWriter writer, MethodReference method, IMethodCollector methodCollector, IMethodVerifier methodVerifier, ISourceAnnotationWriter sourceAnnotationWriter, IIcallMappingService icallMapping, VTableBuilder vtableBuilder)
at Unity.IL2CPP.SourceWriter.<>c__DisplayClass12_0.<WriteMethodSourceFiles>b__0(IGeneratedMethodCodeWriter writer, TypeReference type)
at Unity.IL2CPP.SourceWriter.WriteEqualSizedChunks[T](NPath outputDir, IEnumerable`1 items, String fileName, Int64 chunkSize, Action`2 writeItemAction, SourceWritingContext sourceWritingContext)
at Unity.IL2CPP.SourceWriter.WriteMethodSourceFiles(NPath outputDirectory, SourceWritingContext sourceWritingContext, String fileName, IEnumerable`1 typeList, IMethodCollector methodCollector, Boolean writeMarshalingDefinitions)
at Unity.IL2CPP.SourceWriter.Write(NPath outputDir, SourceWritingContext sourceWritingContext, ReadOnlyCollection`1 assemblyDefinitions, IMethodCollector methodCollector, IInteropDataCollector interopDataCollector)
at Unity.IL2CPP.AssemblyConverter.Apply()
at Unity.IL2CPP.AssemblyConverter.ConvertAssemblies(IEnumerable`1 assemblyDirectories, IEnumerable`1 explicitAssemblies, NPath outputDir, NPath dataFolder, NPath symbolsFolder, NPath executableAssembiesFolder, NPath monoLibFolder, NPath monoEtcFolder, NPath[] searchDirectories, String entryAssemblyName, NPath[] extraTypesFiles)
at il2cpp.Program.DoRun(String[] args)
at il2cpp.Program.Run(String[] args)
at il2cpp.Program.Main(String[] args)
stderr:
Unhandled Exception: System.InvalidOperationException: Stack empty.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.Stack`1.Pop()
at Unity.IL2CPP.StackAnalysis.StackStateBuilder.Build(IEnumerable`1 instructions)
at Unity.IL2CPP.StackAnalysis.StackAnalysis.Analyze()
at Unity.IL2CPP.MethodBodyWriter..ctor(IGeneratedMethodCodeWriter writer, MethodReference methodReference, TypeResolver typeResolver, IRuntimeMetadataAccess metadataAccess, VTableBuilder vTableBuilder, MethodBodyWriterDebugOptions options, ISourceAnnotationWriter sourceAnnotationWriter)
at Unity.IL2CPP.MethodWriter.WriteMethodBody(MethodReference method, IGeneratedMethodCodeWriter methodBodyWriter, IRuntimeMetadataAccess metadataAccess, ISourceAnnotationWriter sourceAnnotationWriter, IIcallMappingService icallMapping, VTableBuilder vtableBuilder)
at Unity.IL2CPP.MethodWriter.<>c__DisplayClass0_0.<WriteMethodDefinition>b__0(IGeneratedMethodCodeWriter bodyWriter, IRuntimeMetadataAccess metadataAccess)
at Unity.IL2CPP.CodeWriterExtensions.WriteMethodWithMetadataInitialization(IGeneratedMethodCodeWriter writer, String methodSignature, String methodFullName, Action`2 writeMethodBody, String uniqueIdentifier, MethodReference methodRef)
at Unity.IL2CPP.MethodWriter.WriteMethodDefinition(IGeneratedMethodCodeWriter writer, MethodReference method, IMethodCollector methodCollector, IMethodVerifier methodVerifier, ISourceAnnotationWriter sourceAnnotationWriter, IIcallMappingService icallMapping, VTableBuilder vtableBuilder)
at Unity.IL2CPP.SourceWriter.<>c__DisplayClass12_0.<WriteMethodSourceFiles>b__0(IGeneratedMethodCodeWriter writer, TypeReference type)
at Unity.IL2CPP.SourceWriter.WriteEqualSizedChunks[T](NPath outputDir, IEnumerable`1 items, String fileName, Int64 chunkSize, Action`2 writeItemAction, SourceWritingContext sourceWritingContext)
at Unity.IL2CPP.SourceWriter.WriteMethodSourceFiles(NPath outputDirectory, SourceWritingContext sourceWritingContext, String fileName, IEnumerable`1 typeList, IMethodCollector methodCollector, Boolean writeMarshalingDefinitions)
at Unity.IL2CPP.SourceWriter.Write(NPath outputDir, SourceWritingContext sourceWritingContext, ReadOnlyCollection`1 assemblyDefinitions, IMethodCollector methodCollector, IInteropDataCollector interopDataCollector)
at Unity.IL2CPP.AssemblyConverter.Apply()
at Unity.IL2CPP.AssemblyConverter.ConvertAssemblies(IEnumerable`1 assemblyDirectories, IEnumerable`1 explicitAssemblies, NPath outputDir, NPath dataFolder, NPath symbolsFolder, NPath executableAssembiesFolder, NPath monoLibFolder, NPath monoEtcFolder, NPath[] searchDirectories, String entryAssemblyName, NPath[] extraTypesFiles)
at il2cpp.Program.DoRun(String[] args)
at il2cpp.Program.Run(String[] args)
at il2cpp.Program.Main(String[] args)
UnityEngine.Debug:LogError(Object)
UnityEditorInternal.Runner:RunProgram(Program, String, String, String, CompilerOutputParserBase) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildUtils.cs:128)
UnityEditorInternal.Runner:RunManagedProgram(String, String, String, CompilerOutputParserBase, Action`1) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildUtils.cs:73)
UnityEditorInternal.IL2CPPBuilder:RunIl2CppWithArguments(List`1, Action`1, String) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:376)
UnityEditorInternal.IL2CPPBuilder:ConvertPlayerDlltoCpp(String, String, String, Boolean) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:357)
UnityEditorInternal.IL2CPPBuilder:Run() (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:211)
UnityEditorInternal.IL2CPPUtils:RunIl2Cpp(String, String, IIl2CppPlatformProvider, Action`1, RuntimeClassRegistry) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:35)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr) (at C:/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:179)

Error 2:
Exception: C:\Program Files\Unity_2018.4.30f1\Editor\Data\il2cpp/build/il2cpp.exe did not run properly!
UnityEditorInternal.Runner.RunProgram (UnityEditor.Utils.Program p, System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildUtils.cs:130)
UnityEditorInternal.Runner.RunManagedProgram (System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser, System.Action`1[T] setupStartInfo) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildUtils.cs:73)
UnityEditorInternal.IL2CPPBuilder.RunIl2CppWithArguments (System.Collections.Generic.List`1[T] arguments, System.Action`1[T] setupStartInfo, System.String workingDirectory) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:376)
UnityEditorInternal.IL2CPPBuilder.ConvertPlayerDlltoCpp (System.String inputDirectory, System.String outputDirectory, System.String workingDirectory, System.Boolean platformSupportsManagedDebugging) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:357)
UnityEditorInternal.IL2CPPBuilder.Run () (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:211)
UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String tempFolder, System.String stagingAreaData, UnityEditorInternal.IIl2CppPlatformProvider platformProvider, System.Action`1[T] modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:35)
UnityEditor.Android.PostProcessor.Tasks.RunIl2Cpp.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <267278aa48b840c7a0e7281223ea050e>:0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <267278aa48b840c7a0e7281223ea050e>:0)
UnityEditor.Android.PostProcessAndroidPlayer.PostProcess (UnityEditor.BuildTarget target, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at <267278aa48b840c7a0e7281223ea050e>:0)
UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <267278aa48b840c7a0e7281223ea050e>:0)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:288)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr) (at C:/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:179)

It seems to work in Editor...

Could anyone help me?

 

Do you found any solution? I have the same problem.