Using 1.1.14 with no mods. Very large forum which has been in use for 5+ years.
When anyone tries to search over the past couple of days, it either logs them out or just becomes a blank page. For example, you click on the search button, get to the simple search page, enter a term and click 'search' and you get just a blank page. No error message or anything, just a blank white screen.
I also get the same issue in the admin panel - when I click on the 'search method' tab under the Search section of the admin panel I get the same blank screen. This has also happened with some other random functions as well.
Any help is greatly appreciated, I'm not sure what I'm doing wrong.
Has anything else about the forum or the server changed just before this problem began?