Could not identify the expected checkerboard points of interest. The expected checkerboard has 4x4 inner corners.

So, I was trying this Camera Calibration on City Sample Unreal Engine. I used camera settings for lens file instead of using Live Link for some unavoidable reasons of my pc configurations. So, after inputting all parameters I get the checkerboard like this.


And I get this error while doing the calibration process:

Could not identify the expected checkerboard points of interest. The expected checkerboard has 4x4 inner corners.
What do you think what could be the issue? This is my first Unreal Project, so any help will be appreciated. Thanks in advance.
type or paste code here

If you have not found the answer yet, I had the same problem. You need to add your media plate texture to your lens calibration. When you created your lens file, assigned it to your Lens Component and opened it, a CameraCalib_TestLensFile_MediaPlate will be created in your Outliner. Select this and in the Details for it, select Inputs, MediaSource and assign your Input Texture for your Camera to the Media Source Texture. This should fix the problem.