I am having the same problem, I have my domain with GoDaddy, just upgraded wordpress via the admin panel in WordPress and now I can't access my blog or the admin panel, so I am unable to deactivate the plugin thats causing the problem.
I cannot upgrade through GoDaddy as I have more than one WordPress installation and GoDaddy upgrades the other folder.
My Blog address is http://lotusmedicalinternational.com/Blog/
and the error I receive is
"Site error: the file /home/content/92/8044892/html/Blog/wp-content/plugins/seo-alrp/php/admin/registration.php requires the ionCube PHP Loader ioncube_loader_lin_5.2.so to be installed by the website operator. If you are the website operator please use the ionCube Loader Wizard to assist with installation."
Can someone please help, I have followed the instructions in the icoCube Wizard and am getting totally lost!
Thank you so much