57 slide limit

Hi,
The plugin is working great for us. however, I have a slideshow of 57 slides and I cannot add another one. I can remove the 57th one and add another, but when I try to add a 58th slide, the Saved icon displays, yet there are still 57 slides.

Is there a limit set on how many slides can be saved?

https://ww.wp.xz.cn/plugins/camera-slideshow/