Why is Next gen gallery going off toss?

Hi team,

This is Next Gen gallery;
https://amritavidyalayam.org/photo-gallery-2/
It goes off toss in this url.

But inside subdomain, it works fine. Uses same plugin..
eg: https://ptta.amritavidyalayam.org/photo-gallery/

Someone let me know what might be wrong?

Thanks,
Sj