Thanks for your reply - I think it's probably an error with me not meeting minimum specs. I have an Apache Pro laptopwith Nvidia1060 (3GB). I think minimum is 4GB, recomended 6/8GB+ I have since found a workaround by using a github cloud version, which works on low-spec machines (my laptop, old Lenovo tablet and my Samsung Galaxy A20 phone) using a browser...I've managed to make 1300 images in a day or two.
https://myalbum.com/album/gH5srPyFm6Z4qW/