Error to change Logo and Slider images

It’s OK to add logo and Slider images at the first time.
But it’s not working when you try to change the image.

Process to reproduce the error:
1. remove image by clicking the remove button
2. click upload the javascript error thraw:
ReferenceError: event is not defined
optionsframework_add_file(event, $(this).parents(‘.section’));

please help and fix. Thanks.