Stereo Calibration error

Hi, I tried using calibration.py and stereo_calibration.py to calibrate and remap my stereo camera system. After many attempts with my stereo camera, I tried your dataset just to ensure that it works how it should and I got this result (https://ctrlv.link/gui8). Does anyone have any idea what could be the problem, any help is greatly appreciated, I've been stuck for days trying different solutions