I am new to blender and animation in general. I poured hours into one simple 2d animation. i had a basic version that saved and worked. I came back and made some visual improvments and added sounds. but now there is no image appearing in the video editor and whenever i try to render it sticks at zero frames and shows a black screen.. (i can still load the file and play it perfectly with sounds and everything, the problem comes as soon as i try to render again.)

what am i doing wrong?? ive been trying to fix it for so long!

Edit: I can render the animation but all frames are black

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