Unable to Package my project 5.3

Ive recently moved from Unreal 5.2 to 5.3 and had a good moment to do a quick test build of the project. Unfortunately I keep getting a PackagingResult Error : Unknown Error

Here is the Output Log

UATHelper: Packaging (Windows): Running AutomationTool…
UATHelper: Packaging (Windows): Using bundled DotNet SDK version: 6.0.302
UATHelper: Packaging (Windows): Starting AutomationTool…
UATHelper: Packaging (Windows): Parsing command line: -ScriptsForProject=“C:/Users/User/Documents/Unreal Projects/BabaY 5.2 5.3/BabaY.uproject” Turnkey -command=VerifySdk -platform=Win64 -UpdateIfNeeded -EditorIO -EditorIOPort=62143 -project=“C:/Users/User/Documents/Unreal Projects/BabaY 5.2 5.3/BabaY.uproject” BuildCookRun -nop4 -utf8output -nocompileeditor -skipbuildeditor -cook -project=“C:/Users/User/Documents/Unreal Projects/BabaY 5.2 5.3/BabaY.uproject” -unrealexe=“C:\Program Files\Epic Games\UE_5.3\Engine\Binaries\Win64\UnrealEditor-Cmd.exe” -platform=Win64 -installed -stage -archive -p
ackage -build -clean -pak -compressed -prereqs -archivedirectory=D:/BabaBuild -distribution -clientconfig=Shipping -nocompile -nocompileuat
UATHelper: Packaging (Windows): Initializing script modules…
UATHelper: Packaging (Windows): Total script module initialization time: 0.18 s.
UATHelper: Packaging (Windows): Executing commands…
UATHelper: Packaging (Windows): Installed Sdk validity:
UATHelper: Packaging (Windows): Win64: (Status=Valid, MinAllowed_Sdk=10.0.00000.0, MaxAllowed_Sdk=10.9.99999.0, Current_Sdk=10.0.18362.0, Allowed_AutoSdk=10.0.18362.0, Current_AutoSdk=, Flags=“InstalledSdk_ValidVersionExists, Sdk_HasBestVersion”)
UATHelper: Packaging (Windows): Scanning for envvar changes…
UATHelper: Packaging (Windows): … done!
UATHelper: Packaging (Windows): Cleaning Temp Paths…
UATHelper: Packaging (Windows): BUILD SUCCESSFUL
UATHelper: Packaging (Windows): Setting up ProjectParams for C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3\BabaY.uproject
UATHelper: Packaging (Windows): ********** BUILD COMMAND STARTED **********
UATHelper: Packaging (Windows): Running: C:\Program Files\Epic Games\UE_5.3\Engine\Binaries\ThirdParty\DotNet\6.0.302\windows\dotnet.exe “C:\Program Files\Epic Games\UE_5.3\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll” BabaY Win64 Shipping -Project=“C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3\BabaY.uproject” -Clean -NoHotReload “C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3\BabaY.uproject” -NoUBTMakefiles -remoteini=“C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3” -skipdeploy -distribution -log=“C:\Users\User\AppData\Roaming\Unreal Engine\AutomationToo
l\Logs\C+Program+Files+Epic+Games+UE_5.3\UBT-BabaY-Win64-Shipping.txt”
UATHelper: Packaging (Windows): Log file: C:\Users\User\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_5.3\UBT-BabaY-Win64-Shipping.txt
UATHelper: Packaging (Windows): Cleaning BabaY binaries…
UATHelper: Packaging (Windows): Took 0.83s to run dotnet.exe, ExitCode=0
UATHelper: Packaging (Windows): Running: C:\Program Files\Epic Games\UE_5.3\Engine\Binaries\ThirdParty\DotNet\6.0.302\windows\dotnet.exe “C:\Program Files\Epic Games\UE_5.3\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll” BabaY Win64 Shipping -Project=“C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3\BabaY.uproject” -Manifest=“C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3\Intermediate\Build\Manifest.xml” -remoteini=“C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3” -skipdeploy -distribution -log=“C:\Users\User\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+
Program+Files+Epic+Games+UE_5.3\UBT-BabaY-Win64-Shipping_2.txt”
UATHelper: Packaging (Windows): Log file: C:\Users\User\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_5.3\UBT-BabaY-Win64-Shipping_2.txt
UATHelper: Packaging (Windows): Creating makefile for BabaY (no existing makefile)
UATHelper: Packaging (Windows): Writing manifest to C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3\Intermediate\Build\Manifest.xml
UATHelper: Packaging (Windows): Building BabaY…
UATHelper: Packaging (Windows): Using Visual Studio 2022 14.38.33134 toolchain (C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130) and Windows 10.0.18362.0 SDK (C:\Program Files (x86)\Windows Kits\10).
UATHelper: Packaging (Windows): [Upgrade]
UATHelper: Packaging (Windows): [Upgrade] Using backward-compatible build settings. The latest version of UE sets the following values by default, which may require code changes:
UATHelper: Packaging (Windows): [Upgrade] CppStandard = CppStandardVersion.Default => Updates C++ Standard to C++20 (Previously: CppStandardVersion.Cpp17).
UATHelper: Packaging (Windows): [Upgrade] WindowsPlatform.bStrictConformanceMode = true => Updates MSVC strict conformance mode to true (Previously: false).
UATHelper: Packaging (Windows): [Upgrade] Suppress this message by setting ‘DefaultBuildSettings = BuildSettingsVersion.V4;’ in BabaY.Target.cs, and explicitly overriding settings that differ from the new defaults.
UATHelper: Packaging (Windows): [Upgrade]
UATHelper: Packaging (Windows): Determining max actions to execute in parallel (6 physical cores, 12 logical cores)
UATHelper: Packaging (Windows): Executing up to 6 processes, one per physical core
UATHelper: Packaging (Windows): Requested 1.5 GB memory per action, 3.95 GB available: limiting max parallel actions to 2
UATHelper: Packaging (Windows): ------ Building 7 action(s) started ------
UATHelper: Packaging (Windows): [1/7] Compile [x64] SharedPCH.Core.Cpp17.cpp
UATHelper: Packaging (Windows): [2/7] Compile [x64] Module.BabaY.cpp
UATHelper: Packaging (Windows): [3/7] Resource Default.rc2
UATHelper: Packaging (Windows): …\Build\Windows\Resources\Default.rc2(95) : error RC2175 : resource file C:\Users\User\Documents\Unreal Projects\BabaY 5.2 5.3\Build\Windows\Application.ico is not in 3.00 format
UATHelper: Packaging (Windows): [4/7] Compile [x64] SharedPCH.Engine.Cpp17.cpp
UATHelper: Packaging (Windows): [5/7] Compile [x64] Module.InteractiveWorld.cpp
UATHelper: Packaging (Windows): Total time in Parallel executor: 32.07 seconds
UATHelper: Packaging (Windows): Total execution time: 48.67 seconds
UATHelper: Packaging (Windows): Took 48.81s to run dotnet.exe, ExitCode=6
UATHelper: Packaging (Windows): UnrealBuildTool failed. See log for more details. (C:\Users\User\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_5.3\UBT-BabaY-Win64-Shipping_2.txt)
UATHelper: Packaging (Windows): AutomationTool executed for 0h 0m 52s
UATHelper: Packaging (Windows): AutomationTool exiting with ExitCode=6 (6)
UATHelper: Packaging (Windows): BUILD FAILED
PackagingResults: Error: Unknown Error

Not every file named .ico is an icon in ico format. You can use some online convertor to be sure it’s in proper format and not just a renamed .jpg

It looks like the Application is in Ico file

I made a new image and converted it differently this time and that fixed it thanks alot!

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