https://prnt.sc/2j6HEP1opRlK
I cannot link or click on the left hand, it is constantly coming up as an error, I've tried inverting the same  right hand into a new image, exporting the same image 4 different times, I've change the size of the specific image, nothing seems to work.

something really specific on the image itself must be making the program fail to create the sprite’s hitbox. I’ll add a work around for this next update.

For now you can mouse scroll to select the left hand sprite, increase both the animation speed and frames, then put them back to the default, it should give it a square hitbox instead.