You can try to Deactive the plugin from the Database… Login to your Cpanel ==> Phpmyadmin ==> YourDatabase ==> look for the wp_options table, there you can see : active_plugins ==> Click on the Pencil (Edit/Modify) ==> Find The line of Your Plugin on the Option_Value Raw Then simply Change the a:1 To a:0 and Save !
Then check again by using the normal way to login…