Why do is there a gaping hole in camera view but not in viewport shading? viewport:

camera view:


The shape is just a plane with two edges raised up to form a semi-room. Beveled the corners. Classic. I added a solidify modifier to see if being thicker would fix the hole but it didn't. The hole happens in rendering too.
shape of the background without object:
Your clipping distance is too high. Select your camera, press the little camera icon in the bottom right of your screen. Then, reduce Clip start to the lowest value. Right now it is too high in the picture, make it lower than that