installed sportspress but now I cannot access my admin

Hi

I’ve just installed the sportspress plugin on to https://www.garbocc.co.uk but during installation my screen went blank and now I cannot access any of my admin/dashboard area at https://www.garbocc.co.uk/wp-admin.

Five minutes previously I had just installed the nextGEN gallery plugin so this could also be a possible cause of the problem.

My website is running the Zuki theme by Elma. Maybe Zuki cannot run with sportspress or nextGEN?

I’ve tried logging in and out again but this hasn’t helped. How can I resolve this problem? I guess an easy fix would be for me to disable the plugins but I cannot access them. Hope someone can help.

Thank you
Nick