Search function not working properly...

[Richie]

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.

[Angelina Belle]

Has anything else about the forum or the server changed just before this problem began?