Do you think its because of your OS/laptop/camera related thing which made you to click?
I assume that the photos clicked will be displayed for you to verify and move further, correct?
So either case, if its not clicking by itself then i should click. I assume that there is a button in that page to capture/click the photo/image.
No, I think that is the way the system is designed. I held the health card in the green box within the square and then clicked the button (I think it was called 'Take Photo', I don't remember). It'll show the photo you clicked and you'll see the options to either 'Approve' this photo or take the photo again. I had to do this several times to get the best possible quality - As long as the name, DOB and the ID# are visible clearly without issues, you should be good. The photo quality still wasn't great but I was able to read the contents of my ID without issues.
Same for your photo, you look into the camera and ensure your face is inside the green oval and then click on 'Take Photo' button. It'll click your photo. You can then proceed to take the test.