After update everything seems wrong obstacle avoidance is not working correctly an all my photos seem to be blurry

Seems you're in sports mode. In that case obstacle avoidance is not active. Also your shutter speed looks to be at 1/4. Will be difficult to get a sharp pictures with that.
Please go back to P-mode first and see if that makes any difference. For the camera settings, specifically at night shots, it's best to go back to manual mode and make some adjustments. There are posts on the forum that will guide you on how to do that.

Hope that helps.

Still does not work even when not in sport mode

Says disabled even when it's on

Still does not work

After update the obstacle avoidance dont work

OA does not work well in low light, try it in day time.

It is a firmware change.  Longer thread about the issue in the Mavic 2 Zoom subforum

Hi there, thank you for reaching out and we're sorry to hear about the trouble you facing, Regarding that It is normal that the sensing icons on DJI GO 4 Android are all red when the aircraft does not take off, as the aircraft can detect obstacles. This is a normal condition, and the sensing system is not affected. This will be optimized in the next firmware version.

Thanks for help

DJI Stephen Posted at 2018-10-21 09:12
Hi there, thank you for reaching out and we're sorry to hear about the trouble you facing, Regarding that It is normal that the sensing icons on DJI GO 4 Android are all red when the aircraft does not take off, as the aircraft can detect obstacles. This is a normal condition, and the sensing system is not affected. This will be optimized in the next firmware version.

when the next firmware

Obstacle avoidance won’t work in sports mode, and your camera settings could be the source of your problem fuzzy pictures coming from movements in the camera on long shutter speed.