trying to click on Gallery Statistics in Admin every time i click it shows

zp-core/utilities/gallery_statistics.php?

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 1048576 bytes) in public_html/zp-core/class-gallery.php on line 375

any solution?

The error at least means that your server is not capable. Why that is so I don't know right now. Please open a ticket with extact data (like how many images and albums you have). Probably that script could use some optimization...