Error uploading item

While trying to add new item, (.zip file, 23mb), it goes just to 5% and shows this msg:
http://postimg.org/image/i2vuznv6f/

Please, remove empty space chars from the zip file.

my zip file contain .php, .html , js files and i am not able to upload.

even image showing upload error