Cook failure

UATHelper: Cooking (Windows): LogInit: Display: LogCore: Error: Invalid input P=-30.000000 Y=-nan R=0.000000 to FRotator::Quaternion - generated NaN output: X=nan Y=nan Z=nan W=-nan
UATHelper: Cooking (Windows): LogInit: Display: LogUObjectGlobals: Warning: Failed to load ‘/Game/TopDownBP/TopDownOverview’: Can’t find file.
UATHelper: Cooking (Windows): LogInit: Display: LogUObjectGlobals: Warning: Failed to find object ‘Class /Game/TopDownBP/TopDownOverview.TopDownOverview_C’
UATHelper: Cooking (Windows): LogInit: Display:
UATHelper: Cooking (Windows): LogInit: Display: Failure - 1 error(s), 3 warning(s)
UATHelper: Cooking (Windows): LogInit: Display:
UATHelper: Cooking (Windows):
UATHelper: Cooking (Windows): Execution of commandlet took: 10.79 seconds
UATHelper: Cooking (Windows): LogShaderCompilers: Display: Shaders left to compile 0
UATHelper: Cooking (Windows): FGlobalDynamicReadBuffer::Cleanup()
UATHelper: Cooking (Windows): FGlobalDynamicReadBuffer::Cleanup()
UATHelper: Cooking (Windows): FGlobalDynamicReadBuffer::Cleanup()
UATHelper: Cooking (Windows): Took 17,9464773s to run UE4Editor-Cmd.exe, ExitCode=1
UATHelper: Cooking (Windows): ERROR: Cook failed.
UATHelper: Cooking (Windows): (see C:\Users\adamh\AppData\Roaming\Unreal Engine\AutomationTool\Logs\D+Fortnite+UE_4.23\Log.txt for full exception trace)
UATHelper: Cooking (Windows): AutomationTool exiting with ExitCode=25 (Error_UnknownCookFailure)
UATHelper: Cooking (Windows): BUILD FAILED

***Can someone propose me some help? Thanks.***