Hello- I have a client who has been getting a white screen that says : Disallowed Key Characters. -
You can see the first page and maybe a second page but then, when you click on the link, you get that error and all the other pages.
I did install the most recent update to EE but I am still getting the error. This is the site: http://www.publishersroundtable.org
It happens on different browsers and seems to be happening for all users. I know some other people had this issue too but I thought it would be solved by doing the upgrade.
I did try going through the instructions in here: https://support.ellislab.com/bugs/detail/16909 but when I open my Input.php it doesn’t seem like that would be the right place to put that PHP code. I am a little nervous that something I could do could make the situation worse. That line 459 appears right in the middle of my ip_address function.
Does anyone have any advice?
Thanks!