Callstack Error(Internationalization\Text.cpp]) in Editor UE5.6

Hi there, hopfully I won`t open a topic wich was already posted. Inside Editor I got the following Errormessage:

LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error: Ensure condition failed: TextData [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Internationalization\Text.cpp] [Line: 313]
LogOutputDevice: Error: Stack:
LogOutputDevice: Error: [Callstack] 0x00007ffc199471ed UnrealEditor-Core.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc19015d1e UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc19015c40 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbcd749efd UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbcd7a662c UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbcd79a9ab UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18b589df UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18df1288 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18ad43e0 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18aad20e UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18df1bc5 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18dba975 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1914ca9f UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1915543a UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc19159c5e UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1915b288 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1916bb07 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1917e393 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1915e153 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18b8e74f UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc18b8e3dc UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1909e609 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1909d7a8 UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc1909dd9e UnrealEditor-CoreUObject.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc18bacc4 UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc18a5fdd UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc188b7bf UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc19aec876 UnrealEditor-Core.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbcf9b1574 UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc24b8152 UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc1d012fd UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc1d00b2f UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc24f3438 UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffbc24b4f4f UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff7adc8e4c4 UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff7adc8e6ba UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff7adc9209e UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff7adca4e44 UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff7adca80fa UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc9307e957 KERNEL32.DLL!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffc94e2ad6c ntdll.dll!UnknownFunction

Testing the Project inside of the Editor works fine without crashes, but cooking, fails.

I am not really sure what causes this Error and how to fix it. I read about missing Language Files inside of the Project and tried to fix it with no effort. (Importing the Internationalization Files into Project).

Does anyone have an ideas, what could lead to this Error and how to fix it? Many thanks in advance. And sorry for bad English.