plugin not working

I’ve download the plugin but it doesn’t seem to work out for me.
When i press the crop option there’s a window opening where i can choose the part i want’ but then i don’t have the button to get out and save it, so the picture docent really crop..
I’ve tried to press the X button but still, no picture saves as i crop it.
it says that it successfully cropped it…but the image is not cropped

https://wordpress.org/plugins/manual-image-crop/