I have problems opening the project in Rider/Visual Studio after updating from UE 5.5.3 to 5.5.4. Is there anyone having similar problems?

FatihBuyuktas · March 12, 2025, 2:36pm

Here is Rider Log:

10:06:37.476: Generating Rider project files:
10:06:37.876: Total execution time: 1.48 seconds
10:06:37.938: System.Text.Json(0): error: JsonReaderException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. LineNumber: 0 | BytePositionInLine: 0.
10:06:37.939:    at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)
10:06:37.939:    at System.Text.Json.Utf8JsonReader.Read()
10:06:37.939:    at System.Text.Json.JsonDocument.Parse(ReadOnlySpan`1 utf8JsonSpan, JsonReaderOptions readerOptions, MetadataDb& database, StackRowStack& stack)
10:06:37.939:    at System.Text.Json.JsonDocument.Parse(ReadOnlyMemory`1 utf8Json, JsonReaderOptions readerOptions, Byte[] extraRentedArrayPoolBytes, PooledByteBufferWriter extraPooledByteBufferWriter)
10:06:37.939:    at System.Text.Json.JsonDocument.Parse(ReadOnlyMemory`1 json, JsonDocumentOptions options)
10:06:37.939:    at System.Text.Json.JsonDocument.Parse(String json, JsonDocumentOptions options)
10:06:37.939:    at EpicGames.Core.JsonObject.Parse(String text) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\Shared\EpicGames.Core\JsonObject.cs:line 289
10:06:37.939:    at EpicGames.Core.JsonObject.Read(FileReference file) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\Shared\EpicGames.Core\JsonObject.cs:line 250
10:06:37.939:    at UnrealBuildTool.DynamicCompilation.RequiresCompilation(IEnumerable`1 SourceFiles, FileReference AssemblyManifestFilePath, FileReference OutputAssemblyPath, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\DynamicCompilation.cs:line 70
10:06:37.939:    at UnrealBuildTool.DynamicCompilation.CompileAndLoadAssembly(FileReference OutputAssemblyPath, IEnumerable`1 SourceFileNames, ILogger Logger, IEnumerable`1 ReferencedAssembies, IEnumerable`1 PreprocessorDefines, Boolean DoNotCompile, Boolean ForceCompile, Boolean TreatWarningsAsErrors) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\DynamicCompilation.cs:line 314
10:06:37.939:    at UnrealBuildTool.RulesAssembly..ctor(RulesScope Scope, IReadOnlyList`1 BaseDirs, IReadOnlyList`1 Plugins, IReadOnlyDictionary`2 ModuleFileToContext, IReadOnlyList`1 TargetFiles, FileReference AssemblyFileName, Boolean bContainsEngineModules, Nullable`1 DefaultBuildSettings, Boolean bReadOnly, Boolean bSkipCompile, Boolean bForceCompile, RulesAssembly Parent, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesAssembly.cs:line 191
10:06:37.939:    at UnrealBuildTool.RulesCompiler.CreateMarketplaceRulesAssembly(IReadOnlyList`1 Plugins, Boolean bReadOnly, Boolean bSkipCompile, Boolean bForceCompile, RulesAssembly Parent, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesCompiler.cs:line 226
10:06:37.939:    at UnrealBuildTool.RulesCompiler.CreateEngineRulesAssembly(Boolean bUsePrecompiled, Boolean bSkipCompile, Boolean bForceCompile, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesCompiler.cs:line 110
10:06:37.939:    at UnrealBuildTool.RiderProjectFileGenerator.AddProjectsForAllTargets(PlatformProjectGeneratorCollection PlatformProjectGenerators, List`1 AllGames, ILogger Logger, ProjectFile& EngineProject, List`1& GameProjects, Dictionary`2& ProgramProjects) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\ProjectFiles\Rider\RiderProjectFileGenerator.cs:line 238
10:06:37.939:    at UnrealBuildTool.RiderProjectFileGenerator.GatherProjects(PlatformProjectGeneratorCollection PlatformProjectGenerators, List`1 AllGameProjects, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\ProjectFiles\Rider\RiderProjectFileGenerator.cs:line 498
10:06:37.939:    at UnrealBuildTool.RiderProjectFileGenerator.GenerateProjectFiles(PlatformProjectGeneratorCollection PlatformProjectGenerators, String[] arguments, Boolean bCacheDataForEditor, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\ProjectFiles\Rider\RiderProjectFileGenerator.cs:line 470
10:06:37.939:    at UnrealBuildTool.GenerateProjectFilesMode.ExecuteAsync(CommandLineArguments Arguments, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\GenerateProjectFilesMode.cs:line 260
10:06:37.939:    at UnrealBuildTool.UnrealBuildTool.Main(String[] ArgumentsArray) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 687

Also Rider recommends me to reinstall the RiderLink plugin. When I try to add it to the Engine or Project I get the following error.

Log file: C:\Users\Fatih\AppData\Roaming\Unreal Engine\AutomationTool\Logs\D+Epic+Games+UE_5.5\UBA-UnrealEditor-Win64-Development.txt
Total execution time: 0.99 seconds
System.Text.Json(0): error: JsonReaderException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. LineNumber: 0 | BytePositionInLine: 0.
   at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)
   at System.Text.Json.Utf8JsonReader.Read()
   at System.Text.Json.JsonDocument.Parse(ReadOnlySpan`1 utf8JsonSpan, JsonReaderOptions readerOptions, MetadataDb& database, StackRowStack& stack)
   at System.Text.Json.JsonDocument.Parse(ReadOnlyMemory`1 utf8Json, JsonReaderOptions readerOptions, Byte[] extraRentedArrayPoolBytes, PooledByteBufferWriter extraPooledByteBufferWriter)
   at System.Text.Json.JsonDocument.Parse(ReadOnlyMemory`1 json, JsonDocumentOptions options)
   at System.Text.Json.JsonDocument.Parse(String json, JsonDocumentOptions options)
   at EpicGames.Core.JsonObject.Parse(String text) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\Shared\EpicGames.Core\JsonObject.cs:line 289
   at EpicGames.Core.JsonObject.Read(FileReference file) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\Shared\EpicGames.Core\JsonObject.cs:line 250
   at UnrealBuildTool.DynamicCompilation.RequiresCompilation(IEnumerable`1 SourceFiles, FileReference AssemblyManifestFilePath, FileReference OutputAssemblyPath, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\DynamicCompilation.cs:line 70
   at UnrealBuildTool.DynamicCompilation.CompileAndLoadAssembly(FileReference OutputAssemblyPath, IEnumerable`1 SourceFileNames, ILogger Logger, IEnumerable`1 ReferencedAssembies, IEnumerable`1 PreprocessorDefines, Boolean DoNotCompile, Boolean ForceCompile, Boolean TreatWarningsAsErrors) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\DynamicCompilation.cs:line 314
   at UnrealBuildTool.RulesAssembly..ctor(RulesScope Scope, IReadOnlyList`1 BaseDirs, IReadOnlyList`1 Plugins, IReadOnlyDictionary`2 ModuleFileToContext, IReadOnlyList`1 TargetFiles, FileReference AssemblyFileName, Boolean bContainsEngineModules, Nullable`1 DefaultBuildSettings, Boolean bReadOnly, Boolean bSkipCompile, Boolean bForceCompile, RulesAssembly Parent, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesAssembly.cs:line 191
   at UnrealBuildTool.RulesCompiler.CreateMarketplaceRulesAssembly(IReadOnlyList`1 Plugins, Boolean bReadOnly, Boolean bSkipCompile, Boolean bForceCompile, RulesAssembly Parent, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesCompiler.cs:line 226
   at UnrealBuildTool.RulesCompiler.CreateEngineRulesAssembly(Boolean bUsePrecompiled, Boolean bSkipCompile, Boolean bForceCompile, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesCompiler.cs:line 110
   at UnrealBuildTool.RulesCompiler.<>c__DisplayClass9_0.<CreateProjectRulesAssembly>b__0(FileReference _) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesCompiler.cs:line 254
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at UnrealBuildTool.RulesCompiler.CreateProjectRulesAssembly(FileReference ProjectFileName, Boolean bUsePrecompiled, Boolean bSkipCompile, Boolean bForceCompile, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesCompiler.cs:line 247
   at UnrealBuildTool.RulesCompiler.CreateTargetRulesAssembly(FileReference ProjectFile, String TargetName, Boolean bSkipRulesCompile, Boolean bForceRulesCompile, Boolean bUsePrecompiled, FileReference ForeignPlugin, Boolean bBuildPluginAsLocal, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\System\RulesCompiler.cs:line 425
   at UnrealBuildTool.UEBuildTarget.Create(TargetDescriptor Descriptor, Boolean bSkipRulesCompile, Boolean bForceRulesCompile, Boolean bUsePrecompiled, UnrealIntermediateEnvironment IntermediateEnvironment, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 1269
   at UnrealBuildTool.UEBuildTarget.Create(TargetDescriptor Descriptor, BuildConfiguration BuildConfiguration, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 1220
   at UnrealBuildTool.BuildMode.CreateMakefileAsync(BuildConfiguration BuildConfiguration, TargetDescriptor TargetDescriptor, ISourceFileWorkingSet WorkingSet, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 1144
   at UnrealBuildTool.BuildMode.BuildAsync(List`1 TargetDescriptors, BuildConfiguration BuildConfiguration, ISourceFileWorkingSet WorkingSet, BuildOptions Options, FileReference WriteOutdatedActionsFile, ILogger Logger, Boolean bSkipPreBuildTargets, String ActionTypeFilter) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 402
   at UnrealBuildTool.BuildMode.ExecuteAsync(CommandLineArguments Arguments, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 257
   at UnrealBuildTool.UnrealBuildTool.Main(String[] ArgumentsArray) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 687
Took 1,14s to run dotnet.exe, ExitCode=6
UnrealBuildTool failed. See log for more details. (C:\Users\Fatih\AppData\Roaming\Unreal Engine\AutomationTool\Logs\D+Epic+Games+UE_5.5\UBA-UnrealEditor-Win64-Development.txt)
AutomationTool executed for 0h 0m 8s
AutomationTool exiting with ExitCode=6 (6)
BUILD FAILED
Failed to build RiderLink plugin for D:\Epic Games\UE_5.5
Failed to build RiderLink plugin

Alternatively, I wanted to try if I could open and build the project with Visual Studio.
When I right-click on the project and choose “Generate Visual Studio Project Files” I get the same JSON error (screenshot attached)

Is there anyone else who is having a similar problem?

Regards,
Fatih

FatihBuyuktas · March 12, 2025, 3:27pm

I think I solved the problem. It has been working fine for a few hours.
When the problem first appeared, I could not even create a new C++ project with UE 5.5.4 and I was getting the same error.

I did the following steps to solve the problem:

I removed the Unreal Engine Rider plugins; \UE_5.5\Engine\Plugins\Developer\RiderSourceCodeAccess and UE_5.5\Engine\Plugins\Marketplace\Developer\RiderLink
I opened the project in Rider and built it. Now it was both building and opening and working in UE Editor
I copied the RiderSourceCodeAccess folder back to its original location and also rebuilt RiderLink (from Rider IDE) and I was back to normal.

Regards,
Fatih

system · April 11, 2025, 3:28pm

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