EOS 6D Mark II won't take a photo in live view, video OK

[OlhaKor98]

6d mark ii does not take photos in live view mode. I bought a used camera and everything is great, except for this problem. It records video, but when I press take a photo, the focus works, but the photos are not taken. What could it be? My lens is Sigma 50mm 1.4

[linedog]

I would try a different lens and see if it does the same thing. 

[kvbarkley]

Do you get the focus confirmation beep/dot/green box?

[OlhaKor98]

I still managed to figure it out and launch the photo, but now the problem is different (the screen shows error 70 and I have to restart the camera