Infection? Call to a member function boardIndexTemplate() on a non-object in

[Strajker]

Hello, 

At the start sorry for my poor English. I have very big problem with my forum: http://clearskill.pl/

After you enter the forum appear strange error. This is infection? I cant access the ACP.

In files i dont see any suspicious file.

Help me please.

 

Greet.

@@EDIT

Sorry, its bad section. I have version 3.4.8