[Plugin: Gallery] Out of memory error

Hi, I am getting this error message when I try and view my page:
Out of memory (allocated 73662464) (tried to allocate 40961 bytes) in on line

Fatal error/homepages/25/d424406688/htdocs/wp-content/plugins/gallery-plugin/gallery-plugin.php873

Is there any particular reason why I am receiving this message?

https://www.ads-software.com/extend/plugins/gallery-plugin/