Empty annotations for pascal VOC dataset format

[Hanysix]

I created a dataset using Label Studio and exported it to Pascal VOC format. Some of the images don't have annotations, because the object I want to detect is not present in those images. Unfortunately Label Studio doesn't create annotation files for those images, which leads to a FileNotFoundError when I run

python tools/train.py -f /content/YOLOX/nano_custom.py -d 1 -b 64 -o -c /content/YOLOX/yolox_nano.pth

My questions are: Will Pascal VOC format handle that or do I need to create a custom dataset loader? If I can use VOC format, I have no idea how and what should I modify in order to use it properly.