After Effects motion blur not working

Last time I wanted to use motion blur for one of my project's. I turned it on, checked the 3d render engine, set shutter angle, enable it on the timeline aswell as on the adjustment layer (I don't know what to call it), but even with all of these elements checked, when I create a simple shape keyframe animation, the motion blur is just not displaying, no matter if I have it turned on or off. Even the cc motion blur effect won't change it. I even checked a similar post created 1 year ago, but none of the ideas have solved my problem. Does anyone have any ideas what can I possibly to do solve this problem?