Error at beginning of packaging after upgrading to 4.27.1

Hello,

After upgrading to 4.27.1, most if not all of our content creators are unable to create packages.

This is what I have at the end of the AutomationTool log:

ProjectUtils.ConfigureEnabledPluginForTarget: Ignoring plugin ‘PS4DeviceProfileSelector’ due to unsupported platform in plugin descriptor ProjectUtils.ConfigureEnabledPluginForTarget: Ignoring plugin ‘PS4MoviePlayer’ due to unsupported platform in plugin descriptor ProjectUtils.ConfigureEnabledPluginForTarget: Ignoring plugin ‘XboxOneZlib’ due to unsupported platform in plugin descriptor ProjectUtils.ConfigureEnabledPluginForTarget: Ignoring plugin ‘XboxOneDeviceProfileSelector’ due to unsupported platform in plugin descriptor ProjectUtils.ConfigureEnabledPluginForTarget: Ignoring plugin ‘XboxOneMoviePlayer’ due to unsupported platform in plugin descriptor ProjectUtils.RequiresTempTarget: ###.uproject requires a temporary target.cs to be generated (SunPosition plugin is enabled) InternalUtils.SafeFileExists: SafeFileExists Z:###\UE4\Engine\Programs\AutomationTool\Saved\Rules\UATRules798644565.dll=False DynamicCompilation.RequiresCompilation: Compiling Z:###\UE4\Engine\Programs\AutomationTool\Saved\Rules\UATRules798644565.dll: Assembly does not exist Log.WriteException: ============================================================================== Log.WriteException: ERROR: A default editor target ‘###Editor’ was specified in engine.ini but does not exist Log.WriteException: (see Z:###\UE4\Engine\Programs\AutomationTool\Saved\Logs\Log.txt for full exception trace) Log.WriteException: Log.WriteException: AutomationException: A default editor target ‘###Editor’ was specified in engine.ini but does not exist Log.WriteException: à AutomationTool.ProjectParams.SelectDefaultEditorTarget(List1 AvailableEditorTargets, String& EditorTarget) Log.WriteException: à AutomationTool.ProjectParams.AutodetectSettings(Boolean bReset) Log.WriteException: à AutomationTool.ProjectParams..ctor(FileReference RawProjectPath, BuildCommand Command, String Device, String MapToRun, String AdditionalServerMapParams, ParamList1 Port, String RunCommandline, String StageCommandline, String BundleName, String StageDirectoryParam, String UE4Exe, String SignPak, List1 ClientConfigsToBuild, List1 ServerConfigsToBuild, ParamList1 MapsToCook, ParamList1 MapIniSectionsToCook, ParamList1 DirectoriesToCook, String DDCGraph, String InternationalizationPreset, ParamList1 CulturesToCook, ParamList1 ClientCookedTargets, ParamList1 EditorTargets, ParamList1 ServerCookedTargets, List1 ClientTargetPlatforms, Dictionary2 ClientDependentPlatformMap, List1 ServerTargetPlatforms, Dictionary2 ServerDependentPlatformMap, Nullable1 Build, Nullable1 SkipBuildClient, Nullable1 SkipBuildEditor, Nullable1 Cook, Nullable1 Run, Nullable1 SkipServer, Nullable1 Clean, Nullable1 Compressed, Nullable1 ForceUncompressed, String AdditionalPakOptions, String AdditionalIoStoreOptions, Nullable1 IterativeCooking, String IterateSharedCookedBuild, Nullable1 IterateSharedBuildUsePrecompiledExe, Nullable1 CookAll, Nullable1 CookPartialGC, Nullable1 CookInEditor, String CookOutputDir, Nullable1 CookMapsOnly, Nullable1 CookOnTheFly, Nullable1 CookOnTheFlyStreaming, Nullable1 UnversionedCookedContent, Nullable1 EncryptIniFiles, Nullable1 EncryptPakIndex, Nullable1 EncryptEverything, Nullable1 SkipCookingEditorContent, Nullable1 NumCookersToSpawn, String AdditionalCookerOptions, String OriginalReleaseVersion, String BasedOnReleaseVersion, String CreateReleaseVersion, String CreateReleaseVersionBasePath, String BasedOnReleaseVersionBasePath, Nullable1 GeneratePatch, Nullable1 AddPatchLevel, Nullable1 StageBaseReleasePaks, String DiscVersion, String DLCName, String DiffCookedContentPath, Nullable1 DLCIncludeEngineContent, Nullable1 DLCPakPluginFile, Nullable1 DLCActLikePatch, Nullable1 CrashReporter, Nullable1 DedicatedServer, Nullable1 Client, Nullable1 Deploy, String DeployFolder, String GetFile, Nullable1 FileServer, Nullable1 Foreign, Nullable1 ForeignCode, Nullable1 LogWindow, Nullable1 NoCleanStage, Nullable1 NoClient, Nullable1 NoDebugInfo, Nullable1 SeparateDebugInfo, Nullable1 MapFile, Nullable1 NoXGE, Nullable1 SkipPackage, Nullable1 Package, Nullable1 Pak, Nullable1 IgnorePaksFromDifferentCookSource, Nullable1 IoStore, Nullable1 SkipIoStore, Nullable1 GenerateOptimizationData, Nullable1 Prereqs, String AppLocalDirectory, Nullable1 NoBootstrapExe, Nullable1 SignedPak, Nullable1 PakAlignForMemoryMapping, Nullable1 NullRHI, Nullable1 FakeClient, Nullable1 EditorTest, Nullable1 RunAutomationTests, String RunAutomationTest, Nullable1 CrashIndex, Nullable1 SkipCook, Nullable1 SkipCookOnTheFly, Nullable1 SkipPak, Nullable1 PrePak, Nullable1 SkipStage, Nullable1 Stage, Nullable1 Manifests, Nullable1 CreateChunkInstall, Nullable1 SkipEncryption, Nullable1 Unattended, Nullable1 NumClients, Nullable1 Archive, String ArchiveDirectoryParam, Nullable1 ArchiveMetaData, Nullable1 CreateAppBundle, String SpecifiedClientTarget, String SpecifiedServerTarget, ParamList1 ProgramTargets, Nullable1 Distribution, Nullable1 Prebuilt, Nullable1 RunTimeoutSeconds, String SpecifiedArchitecture, String UbtArgs, String AdditionalPackageOptions, Nullable1 IterativeDeploy, Nullable1 FastCook, Nullable1 IgnoreCookErrors, Nullable1 RunAssetNativization, Nullable1 CodeSign, Nullable1 TreatNonShippingBinariesAsDebugFiles, Nullable1 UseExtraFlavor, String Provision, String Certificate, String Team, Boolean AutomaticSigning, ParamList1 InMapsToRebuildLightMaps, ParamList1 InMapsToRebuildHLOD, ParamList1 TitleID) Log.WriteException: à BuildCookRun.SetupParams() Log.WriteException: à BuildCookRun.ExecuteBuild() Log.WriteException: à AutomationTool.BuildCommand.Execute() Log.WriteException: à AutomationTool.Automation.Execute(List1 CommandsToExecute, Dictionary2 Commands) Log.WriteException: à AutomationTool.Automation.Process(String[] Arguments, StartupTraceListener StartupListener) Log.WriteException: à AutomationTool.Program.MainProc(String[] Arguments, StartupTraceListener StartupListener) Log.WriteException: à AutomationTool.Program.<>c__DisplayClass1_0.b__2() Log.WriteException: à AutomationTool.InternalUtils.RunSingleInstance(Func`1 Main) Log.WriteException: à AutomationTool.Program.Main(String[] Arguments) Log.WriteException: ============================================================================== Program.Main: AutomationTool exiting with ExitCode=1 (Error_Unknown)

I don’t know if the error is related to the UATRules dll or to the default editor target.

But the mentioned UATRules dll exists in the folder.

Regards,
Pierre