Ue4 crashes when selecting multiple assets

i dont know whats going on but this what shows

Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Runtime\Core\Private\HAL\FileManagerGeneric.cpp] [Line: 617]
Invalid BufferCount=0 while reading …/…/…/…/…/…/Users//Documents/Unreal Projects/gameproject/Content/RifleAnimsetPro/Anims/InPlace/Rifle_Prone_AimAdditive_CC.uasset. Pos=76800, Size=76800, PrecacheSize=2147483647, PrecacheOffset=76800

KERNELBASE.dll!UnknownFunction (0x00007ff9b1608b9c) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() (0x00007ff9836c8074) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor-Core.dll!FMsg::Logf__VA() (0x00007ff98354774f) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:531]
UE4Editor-Core.dll!FArchiveFileReaderGeneric::InternalPrecache() (0x00007ff983455ab6) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\hal\filemanagergeneric.cpp:619]
UE4Editor-Core.dll!FArchiveFileReaderGeneric::Serialize() (0x00007ff983475930) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\hal\filemanagergeneric.cpp:656]
UE4Editor-CoreUObject.dll!operator<<() (0x00007ff982b19fb1) + 12 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\packagefilesummary.cpp:13]
UE4Editor-CoreUObject.dll!ULinkerLoad::SerializePackageFileSummary() (0x00007ff982af283e) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:874]
UE4Editor-CoreUObject.dll!ULinkerLoad::Tick() (0x00007ff982afba6f) + 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:567]
UE4Editor-CoreUObject.dll!ULinkerLoad::CreateLinker() (0x00007ff982ab5f1f) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:382]
UE4Editor-CoreUObject.dll!GetPackageLinker() (0x00007ff982acd332) + 23 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linker.cpp:668]
UE4Editor-CoreUObject.dll!LoadPackageInternal() (0x00007ff982b87bd4) + 37 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:835]
UE4Editor-CoreUObject.dll!StaticLoadObject() (0x00007ff982b964d1) + 75 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:724]
UE4Editor-ContentBrowser.dll!ContentBrowserUtils::LoadAssetsIfNeeded() (0x00007ff976799386) + 66 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\contentbrowser\private\contentbrowserutils.cpp:341]
UE4Editor-ContentBrowser.dll!SAssetView::CanOpenContextMenu() (0x00007ff9766c8deb) + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\contentbrowser\private\sassetview.cpp:3172]
UE4Editor-ContentBrowser.dll!SAssetView::OnGetContextMenuContent() (0x00007ff9767b8cca) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\contentbrowser\private\sassetview.cpp:3089]
UE4Editor-ContentBrowser.dll!TMemberFunctionCaller (cdecl SAssetView::)(void) _ptr64>::operator()<>() (0x00007ff9765d6e13) + 15 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor-ContentBrowser.dll!TTupleImpl >::ApplyAfter_ExplicitReturnType,TMemberFunctionCaller (__cdecl SAssetView::
)(void) ptr64> >() (0x00007ff9765dd219) + 19 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\tuple.h:113]
UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetView,0,TSharedPtr cdecl(void)>::Execute() (0x00007ff976729af9) + 36 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor-Slate.dll!TBaseDelegate >::Execute() (0x00007ff97fec2efa) + 6 bytes [d:\buildfarm\buildmachine
++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:439]
UE4Editor-Slate.dll!STableViewBase::OnRightMouseButtonUp() (0x00007ff97fed06ee) + 17 bytes [d:\buildfarm\buildmachine
++depot+ue4-releases+4.7\engine\source\runtime\slate\private\widgets\views\stableviewbase.cpp:673]
UE4Editor-ContentBrowser.dll!SListView >::Private_OnItemRightClicked() (0x00007ff9767d335a) + 20 bytes [d:\buildfarm\buildmachine
++depot+ue4-releases+4.7\engine\source\runtime\slate\public\widgets\views\slistview.h:678]
UE4Editor-ContentBrowser.dll!STableRow >::OnMouseButtonUp() (0x00007ff9767c1865) + 0 bytes [d:\buildfarm\buildmachine
++depot+ue4-releases+4.7\engine\source\runtime\slate\public\widgets\views\stablerow.h:465]
UE4Editor-Slate.dll!::operator()() (0x00007ff97fcacc55) + 207 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4025]
UE4Editor-Slate.dll!FEventRouter::Route >() (0x00007ff97fc6738d) + 21 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:202]
UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() (0x00007ff97fd15104) + 116 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4028]
UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() (0x00007ff97fd04926) + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3949]
UE4Editor-Core.dll!FWindowsApplication::ProcessDeferredMessage() (0x00007ff9836239a9) + 15 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1385]
UE4Editor-Core.dll!FWindowsApplication::DeferMessage() (0x00007ff983615d2e) + 74 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1669]
UE4Editor-Core.dll!FWindowsApplication::ProcessMessage() (0x00007ff983624d50) + 41 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:742]
UE4Editor-Core.dll!FWindowsApplication::AppWndProc() (0x00007ff983613192) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:604]
USER32.dll!UnknownFunction (0x00007ff9b1af250d) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ff9b1af2367) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!FWindowsPlatformMisc::PumpMessages() (0x00007ff9836c3ec6) + 48 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:774]
UE4Editor.exe!FEngineLoop::Tick() (0x00007ff7241300a9) + 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2233]
UE4Editor.exe!GuardedMain() (0x00007ff72412267c) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor.exe!GuardedMainWrapper() (0x00007ff7241226ea) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor.exe!WinMain() (0x00007ff724132219) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor.exe!__tmainCRTStartup() (0x00007ff724133159) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL!UnknownFunction (0x00007ff9b3d113d2) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff9b43fe954) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff9b43fe954) + 0 bytes [UnknownFile:0]