Missing cached shader map generates blocking error

Hi everyone,
I’m trying to package a new project for Winx64 DX11.
I have two scenes in the project, one is a splash screen, empty and not connected to the other level at the moment, and one has a sphere with a simple material that applies a media texture on the sphere. Everything else is C++ and compiles properly.

Running from editor works absolutely fine but. If I try to cook or package with splash map as game default map everything’s ok, but if I set the other map as default this is the error I receive, no other errors or warnings:

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: Mesh && Mesh->GetRenderData() [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp] [Line: 4425]
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffed59bcf72 UnrealEditor-Engine.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffed599800e UnrealEditor-Engine.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffed2384247 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffed23eadd7 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffed240f4e0 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffed221b1bd UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffed223cb5c UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7325e948e UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7325e0bbd UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7325e0e8a UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7325e3c4d UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7325f5564 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7325f788a UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007fff62837034 KERNEL32.DLL!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007fff63d62651 ntdll.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: end: stack for UAT
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Assertion failed: Mesh && Mesh->GetRenderData() [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp] [Line: 4425]
PackagingResults: Error: [Callstack] 0x00007ffed59bcf72 UnrealEditor-Engine.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffed599800e UnrealEditor-Engine.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffed2384247 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffed23eadd7 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffed240f4e0 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffed221b1bd UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffed223cb5c UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7325e948e UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7325e0bbd UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7325e0e8a UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7325e3c4d UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7325f5564 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7325f788a UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007fff62837034 KERNEL32.DLL!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007fff63d62651 ntdll.dll!UnknownFunction []
PackagingResults: Error: end: stack for UAT

The difference between logs is that I have some of these messages:

UATHelper: Packaging (Windows): LogMaterial: Display: Missing cached shadermap for MT_World in PCD3D_SM5, Default, SM5 (DDC key hash: FA9618197D9E106E31FB727941AB294B3B001B78), compiling.

This one in particular is about my material, others are on default materials like M_Opaque.

Can anyone help me please?

Thanks in advance.

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