why i can't see the video preview screen?

[franklinsa1nt]

i'm using Ae 24 and i opened my project after 1 day and i can't see anything really. i don't get it because no any mistake in effects. i don't used bcc and sapphires with tohether. or don't used "firstly deep glow after than s_dropshadow" mistake yk. why i see this screen im just curious 

[tamseel_2394]

checking the layer visibility, the work area settings, or resetting your workspace. If effects seem fine, also double-check your GPU settings or try clearing the cache. If none of that works, restarting AE or even reinstalling might help refresh things.

[thepixelsmith]

You may just be looking at an area away from the canvas (the visible area of the Comp panel).

Try zooming to 100% and then using the Fit command using the Magnification dropdown on the lower left of the comp panel.