Hello, I get this bug all the time when I use the foliage tool. No matter what kind of foliage and no matter if it is a fresh created template or a clean code… could need a bit help 
MachineId:B6B6BC434A8FCA5CED0016BC70A61249
EpicAccountId:d902149349c14f3daa1c0256e88ac993
Unknown exception - code 00000001 (first/second not available)
Assertion failed: InstancedRenderData.InstanceBuffer.GetStride() == sizeof(FInstancingUserData::FInstanceStream) [File:d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\InstancedStaticMesh.h] [Line: 493]
KERNELBASE + 24684 bytes
UE4Editor_Core + 3140052 bytes
UE4Editor_Core + 1614600 bytes
UE4Editor_Core + 1494994 bytes
UE4Editor_Engine + 3798840 bytes
UE4Editor_Engine + 3795880 bytes
UE4Editor_Engine + 4018373 bytes
UE4Editor_Renderer + 1938146 bytes
UE4Editor_Engine + 1561890 bytes
UE4Editor_Engine + 1252957 bytes
UE4Editor_Engine + 5682424 bytes
UE4Editor_Engine + 5709914 bytes
UE4Editor_UnrealEd + 1836728 bytes
UE4Editor_UnrealEd + 6724134 bytes
UE4Editor!FEngineLoop::Tick() + 4084 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2240]
UE4Editor!GuardedMain() + 479 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:131]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]