unreal VR graphic error??

(I used a translator.)

Hi

I’m making a VR game using HTC Vive

I play to test, it will look like a picture

A blinking line appears on the screen

It’s my computer spec.
CPU: Intel(R) Core™ i7-4720HQ CPU @ 2.60GHz
GPU: GeForce GTX 970M
Memoy: 16 GB RAM (15.95 GB RAM 사용 가능)
OS: Microsoft Windows 10 Home

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