Unknown identifier: 'supportDX11'. Error Fix?

Here’s my cameramotionblur.js #pragma strict@script ExecuteInEditMode@script RequireComponent (Camera) - Pastebin.com

Can someone please tell me how to fix this please.

I referred to this post but I can’t make any sense out of it, nor can the person who posted it. Problem: Assets/Standard Assets/Image Effects (Pro Only)/CameraMotionBlur.js(102,20): BCE0005: - Unity Answers

Here’s the error:

Thanks.

Check for Edit>Project settings>Player>scroll for Dx11 support checkbox Good Luck