My game crashes becaus of trees and grass?

when i click launch and try to run the game it says

LogStats:Warning: MetaData mismatch. Did you assign a stat to two groups? New //STATGROUP_Threads//FLauncherTask///Thread_2c90_0///####STATCAT_Advanced#### old //STATGROUP_Threads//FLauncherTask///Thread_4160_0///####STATCAT_Advanced####
LogPlayLevel: CommandUtils.Run: Run: D:\enb\Saved\StagedBuilds\WindowsNoEditor\Engine\Binaries\Win64\UE4Game.exe …/…/…/enb/enb.uproject /Game/Untitled -stdout -abslog=C:\Users\AppData\Local\Temp\C+Program+Files+Epic+Games+4.10\Logs\Client.log -Messaging -nomcp -Windowed -CrashForUAT -SessionId=C5063C904CAC38C533B338B01C133043 -SessionOwner= -SessionName=‘Play On Device’
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game: LogInit:Display: Running engine for game: enb
LogPlayLevel: UE4Game: LogModuleManager:Warning: ModuleManager: Module ‘HTTPChunkInstaller’ not found - its StaticallyLinkedModuleInitializers function is null.
LogPlayLevel: UE4Game: LogInit:Display: RandInit(-2003566092) SRandInit(-2003566091).LogWindows:Error: Windows GetLastError: Handlingen er gennemf�rt. (0)
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game: [2015.11.15-08.49.12:839][ 0]LogWindows:Error: Windows GetLastError: Handlingen er gennemf�rt. (0)LogWindows:Warning: CreateProc failed (2) …....\Engine\Binaries/Win64/CrashReportClient.exe -AppName=UE4-enb
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game: [2015.11.15-08.49.13:117][ 0]LogWindows:Warning: CreateProc failed (2) …....\Engine\Binaries/Win64/CrashReportClient.exe -AppName=UE4-enbLogThreadingWindows:Error: Runnable thread SlateLoadingThread crashed.
LogPlayLevel: UE4Game: LogOutputDevice:Error:
LogPlayLevel: UE4Game: begin: stack for UAT
LogPlayLevel: UE4Game: LogWindows:Error: === Critical error: ===
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game: Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.10\Engine\Source\Runtime\Engine\Private\AI\Navigation\NavCollision.cpp] [Line: 440]
LogPlayLevel: UE4Game: Attempt to build nav collision data for /Game/mat/Broadleaf_Desktop_0.Broadleaf_Desktop_0:NavCollision_0 when we are unable to. This platform requires cooked packages.
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game: Crash in runnable thread SlateLoadingThread
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game: LogOutputDevice:Error:
LogPlayLevel: UE4Game: end: stack for UAT
LogPlayLevel: UE4Game: LogWindows:Error: HandleError re-entered.
LogPlayLevel: UE4Game:
LogPlayLevel: UE4Game: [2015.11.15-08.51.17:716][ 0]LogWindows:Error: HandleError re-entered.
LogPlayLevel: BuildCommand.Execute: ERROR: BUILD FAILED
LogPlayLevel: Program.Main: ERROR: AutomationTool terminated with exception:
LogPlayLevel: Program.Main: ERROR: Exception in AutomationScripts.Automation: Client exited with error code: 3
LogPlayLevel: Stacktrace: ved Project.RunStandaloneClient(List1 DeployContextList, String ClientLogFile, ERunOptions ClientRunFlags, String ClientApp, String ClientCmdLine, ProjectParams Params) LogPlayLevel: ved Project.RunInternal(ProjectParams Params, String ServerLogFile, String ClientLogFile) LogPlayLevel: ved Project.Run(ProjectParams Params) LogPlayLevel: ved BuildCookRun.DoBuildCookRun(ProjectParams Params) LogPlayLevel: ved BuildCommand.Execute() LogPlayLevel: ved AutomationTool.Automation.Execute(List1 CommandsToExecute, CaselessDictionary1 Commands) LogPlayLevel: ved AutomationTool.Automation.Process(String[] CommandLine) LogPlayLevel: ved AutomationTool.Program.MainProc(Object Param) LogPlayLevel: ved AutomationTool.InternalUtils.RunSingleInstance(Action1 Main, Object Param)
LogPlayLevel: ved AutomationTool.Program.Main()
LogPlayLevel: ProcessManager.KillAll: Trying to kill 0 spawned processes.
LogPlayLevel: Program.Main: AutomationTool exiting with ExitCode=Error_Unknown
LogPlayLevel: Domain_ProcessExit
LogPlayLevel: copying UAT log files…
LogPlayLevel: RunUAT.bat ERROR: AutomationTool was unable to run successfully.
LogPlayLevel: Completed Launch On Stage: Run Task, Time: 131.129119
LogPlayLevel: BUILD FAILED

how do i fix this, it is the trees i set in there are doing this !

pls reply fast

Hey Alexanderyy,

If you are able to reproduce this crash consistently, would you provide me with some simple steps to follow as well as attaching your Crash Logs to your response?

We ask that if users are on here for the first time and reporting a bug or crash, they take a look at our How to Report a Bug sticky on the Forums. It will provide you with how to acquire and what information to provide to us so we can assist you effectively.

If you have further questions, please let me know.

Thank you,