Packaging Problems

Having problems packaging my project. Tried cooking it, launching it on my device, still shows the same result. I don’t know how to fix this error, but this happened when I was verifying/reinstalling 5.5. Is there a way to get rid of this problem?

Here is the log that indicates the problem.

UATHelper: Packaging (Windows): LogWindows: Error: appError called: Assertion failed: CurrentApplication.IsValid() [File:D:\build++UE5\Sync\LocalInstall\Engine\Source\Runtime\Slate\Public\Framework\Application\SlateApplication.h] [Line: 307]
UATHelper: Packaging (Windows): LogWindows: Error: begin: stack for UAT
UATHelper: Packaging (Windows): LogWindows: Error: === Critical error: ===
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: Assertion failed: CurrentApplication.IsValid() [File:D:\build++UE5\Sync\LocalInstall\Engine\Source\Runtime\Slate\Public\Framework\Application\SlateApplication.h] [Line: 307]
PackagingResults: Error: appError called: Assertion failed: CurrentApplication.IsValid() [File:D:\build++UE5\Sync\LocalInstall\Engine\Source\Runtime\Slate\Public\Framework\Application\SlateApplication.h] [Line: 307]
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Assertion failed: CurrentApplication.IsValid() [File:D:\build++UE5\Sync\LocalInstall\Engine\Source\Runtime\Slate\Public\Framework\Application\SlateApplication.h] [Line: 307]
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x000001e293182fe4 UnrealEditor-Fab.dll!FSlateApplication::Get() [D:\build++UE5\Sync\LocalInstall\Engine\Source\Runtime\Slate\Public\Framework\Application\SlateApplication.h:307]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x000001e293199d2d UnrealEditor-Fab.dll!FFabBrowser::RegisterSlateStyle() [D:\build++UE5\Sync\LocalBuilds\Fab\0.0.1\HostProject\Plugins\Fab\Source\Fab\Private\FabBrowser.cpp:98]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x000001e29318f08d UnrealEditor-Fab.dll!FFabBrowser::Init() [D:\build++UE5\Sync\LocalBuilds\Fab\0.0.1\HostProject\Plugins\Fab\Source\Fab\Private\FabBrowser.cpp:68]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x000001e2931262ed UnrealEditor-Fab.dll!FFabModule::StartupModule() [D:\build++UE5\Sync\LocalBuilds\Fab\0.0.1\HostProject\Plugins\Fab\Source\Fab\Private\FabModule.cpp:36]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff9cfecf719 UnrealEditor-Core.dll!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffa2fbfa234 UnrealEditor-Projects.dll!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffa2fc15f64 UnrealEditor-Projects.dll!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffa2fbf9ab9 UnrealEditor-Projects.dll!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7e4d1a882 UnrealEditor-Cmd.exe!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7e4d1dd25 UnrealEditor-Cmd.exe!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7e4d15796 UnrealEditor-Cmd.exe!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7e4d15a7a UnrealEditor-Cmd.exe!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7e4d19274 UnrealEditor-Cmd.exe!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7e4d2bc14 UnrealEditor-Cmd.exe!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7e4d2e31a UnrealEditor-Cmd.exe!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffa6e365767 KERNEL32.DLL!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: end: stack for UAT
PackagingResults: Error: [Callstack] 0x000001e293182fe4 UnrealEditor-Fab.dll!FSlateApplication::Get() [D:\build++UE5\Sync\LocalInstall\Engine\Source\Runtime\Slate\Public\Framework\Application\SlateApplication.h:307]
PackagingResults: Error: [Callstack] 0x000001e293199d2d UnrealEditor-Fab.dll!FFabBrowser::RegisterSlateStyle() [D:\build++UE5\Sync\LocalBuilds\Fab\0.0.1\HostProject\Plugins\Fab\Source\Fab\Private\FabBrowser.cpp:98]
PackagingResults: Error: [Callstack] 0x000001e29318f08d UnrealEditor-Fab.dll!FFabBrowser::Init() [D:\build++UE5\Sync\LocalBuilds\Fab\0.0.1\HostProject\Plugins\Fab\Source\Fab\Private\FabBrowser.cpp:68]
PackagingResults: Error: [Callstack] 0x000001e2931262ed UnrealEditor-Fab.dll!FFabModule::StartupModule() [D:\build++UE5\Sync\LocalBuilds\Fab\0.0.1\HostProject\Plugins\Fab\Source\Fab\Private\FabModule.cpp:36]
PackagingResults: Error: [Callstack] 0x00007ff9cfecf719 UnrealEditor-Core.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffa2fbfa234 UnrealEditor-Projects.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffa2fc15f64 UnrealEditor-Projects.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffa2fbf9ab9 UnrealEditor-Projects.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff7e4d1a882 UnrealEditor-Cmd.exe!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff7e4d1dd25 UnrealEditor-Cmd.exe!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff7e4d15796 UnrealEditor-Cmd.exe!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff7e4d15a7a UnrealEditor-Cmd.exe!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff7e4d19274 UnrealEditor-Cmd.exe!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff7e4d2bc14 UnrealEditor-Cmd.exe!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff7e4d2e31a UnrealEditor-Cmd.exe!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffa6e365767 KERNEL32.DLL!UnknownFunction
PackagingResults: Error: end: stack for UAT

2 Likes

same error,

it is related to the Fab UE Plugin, after removing it from the engine, an empty project from a template is packable

1 Like

I also have this error
If you find a solution, don’t forget to write here
PLEASE

1 Like

Update the Fab UE Plugin when it’s available. They fixed the packaging problem.

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