arunjyotidas on "[Plugin: Gallery Bank - Responsive Photo Gallery] 500 Internal Server Error after installation"

Hi,
I have downloaded Gallery Bank 3.0.91 and installed in my WP site http://www.assamsocietyqatar.org (Browsing the zip file)and activated it. But just after activation I got 500 Internal Server Error and both the site and admin dashboard can not be opened .
After some time, the main site and WP dashboard is operational . But None of the Plug in Settings are functional . It says Internal Server Error.
Kindly guide .

https://wordpress.org/plugins/gallery-bank/