SimplyAdrienne

I should probably start by saying that I use Illustrator. You start by setting the size of the artboard to meet the 4 mp requirement. However, if your vector doesn't touch the edges of the artboard (if the artboard is exactly 4 mp), your artwork is not 4 mp. I usually just create a white background that's the size of the artboard if I want to leave some space around the vector or create an artboard that's bigger than 4 mp and make the artwork large enough.

https://www.shutterstock.com/image-vector/active-lifestyle-flat-vector-set-workout-1613719972

I just deleted the pending ones and resubmitted. Everything went smoothly after that.

You're not the only one. I currently have this problem.

The size of you vector needs to be at least 4 megapixels. If your art board is 2000x2000 px and you vector has empty space around it, it's too small. Increase the size of your artboard and make the vector bigger.